{
 "id": "magic/revised-edition/underground-sea",
 "url": "https://cardvolume.com/magic/revised-edition/underground-sea/",
 "markdown_url": "https://cardvolume.com/magic/revised-edition/underground-sea/index.md",
 "name": "Underground Sea",
 "title": "Underground Sea 290 (Revised Edition)",
 "category": "magic",
 "category_name": "Magic: The Gathering",
 "set": "Revised Edition",
 "number": "290",
 "year": 1994,
 "language": "English",
 "rarity": "rare",
 "artist": "Rob Alexander",
 "publisher": "Wizards of the Coast",
 "flagship": false,
 "updated": "2026-09-26",
 "as_of": "2026-09-27",
 "summary": "Underground Sea is the blue-black dual land from Revised Edition. Collectors and players search for it because it is a Reserved List dual land with heavy format-recognition and many visually similar but separate printings.",
 "key_facts": [
  "CardVolume lists 5 verified sales of the Underground Sea 290 (Revised Edition) as of September 27, 2026.",
  "No grade has the 5 verified sales in 90 days needed for a market price; the most recent verified sale was $875.00 for a Revised Edition dual land CGC 6 on August 26, 2026 at Heritage Auctions.",
  "The highest verified sale on record is $875.00 for a Revised Edition dual land CGC 6 on August 26, 2026 at Heritage Auctions."
 ],
 "versions": [
  {
   "key": "revised-dual-land",
   "label": "Revised Edition dual land",
   "how_to_identify": "White-border Revised Edition copy with no expansion symbol, land type Island Swamp, Rob Alexander art, and catalog number 290. Keep separate from Alpha, Beta, Unlimited, Collector's Edition, International Edition, Summer Magic, foreign black-border, and 30th Anniversary Edition treatments."
  }
 ],
 "grades": [
  {
   "version": "Revised Edition dual land",
   "version_key": "revised-dual-land",
   "grader": "CGC",
   "grade": "9",
   "label": "CGC 9",
   "market_price_usd": null,
   "market_sales_n": 1,
   "market_window": null,
   "verified_sales": 1,
   "last_verified_sale": {
    "date": "2026-08-12",
    "price_usd": 843.75,
    "venue": "Heritage Auctions",
    "buyer_premium_included": true,
    "source_url": "https://www.ha.com/c/search/results.zx?archive_state=5327&dept_child=4419&layout=gallery&mode=archive&page=48~30&sb=5&si=2&sold_status=1526"
   },
   "record_sale": {
    "date": "2026-08-12",
    "price_usd": 843.75,
    "venue": "Heritage Auctions",
    "buyer_premium_included": true,
    "source_url": "https://www.ha.com/c/search/results.zx?archive_state=5327&dept_child=4419&layout=gallery&mode=archive&page=48~30&sb=5&si=2&sold_status=1526"
   },
   "population": null,
   "graded_market_value_usd": null
  },
  {
   "version": "Revised Edition dual land",
   "version_key": "revised-dual-land",
   "grader": "CGC",
   "grade": "7.5",
   "label": "CGC 7.5",
   "market_price_usd": null,
   "market_sales_n": 0,
   "market_window": null,
   "verified_sales": 1,
   "last_verified_sale": {
    "date": "2026-04-22",
    "price_usd": 600,
    "venue": "Heritage Auctions",
    "buyer_premium_included": true,
    "source_url": "https://www.ha.com/c/search/results.zx?archive_state=5327&comic_category=2923&comic_grade=~~40t80~94t101&layout=gallery&mode=archive&page=72~59&sb=1&si=2&sold_status=1526"
   },
   "record_sale": {
    "date": "2026-04-22",
    "price_usd": 600,
    "venue": "Heritage Auctions",
    "buyer_premium_included": true,
    "source_url": "https://www.ha.com/c/search/results.zx?archive_state=5327&comic_category=2923&comic_grade=~~40t80~94t101&layout=gallery&mode=archive&page=72~59&sb=1&si=2&sold_status=1526"
   },
   "population": null,
   "graded_market_value_usd": null
  },
  {
   "version": "Revised Edition dual land",
   "version_key": "revised-dual-land",
   "grader": "CGC",
   "grade": "6",
   "label": "CGC 6",
   "market_price_usd": null,
   "market_sales_n": 1,
   "market_window": null,
   "verified_sales": 1,
   "last_verified_sale": {
    "date": "2026-08-26",
    "price_usd": 875,
    "venue": "Heritage Auctions",
    "buyer_premium_included": true,
    "source_url": "https://comics.ha.com/c/search/results.zx?archive_state=5327&auction_name=332634&auction_year=2026&dept=1938&mode=archive&session_desc=3767&sold_status=1526~1524"
   },
   "record_sale": {
    "date": "2026-08-26",
    "price_usd": 875,
    "venue": "Heritage Auctions",
    "buyer_premium_included": true,
    "source_url": "https://comics.ha.com/c/search/results.zx?archive_state=5327&auction_name=332634&auction_year=2026&dept=1938&mode=archive&session_desc=3767&sold_status=1526~1524"
   },
   "population": null,
   "graded_market_value_usd": null
  },
  {
   "version": "Revised Edition dual land",
   "version_key": "revised-dual-land",
   "grader": "Raw",
   "grade": "VG/EX",
   "label": "Raw · VG/EX",
   "market_price_usd": null,
   "market_sales_n": 0,
   "market_window": null,
   "verified_sales": 1,
   "last_verified_sale": {
    "date": "2025-06-04",
    "price_usd": 750,
    "venue": "Heritage Auctions",
    "buyer_premium_included": true,
    "source_url": "https://comics.ha.com/c/search/results.zx?archive_state=5327&auction_name=332523&auction_year=2025&dept=1938&ic4=GalleryView-AuctionNo-051517&mode=archive&sold_status=1526~1524"
   },
   "record_sale": {
    "date": "2025-06-04",
    "price_usd": 750,
    "venue": "Heritage Auctions",
    "buyer_premium_included": true,
    "source_url": "https://comics.ha.com/c/search/results.zx?archive_state=5327&auction_name=332523&auction_year=2025&dept=1938&ic4=GalleryView-AuctionNo-051517&mode=archive&sold_status=1526~1524"
   },
   "population": null,
   "graded_market_value_usd": null
  },
  {
   "version": "Revised Edition dual land",
   "version_key": "revised-dual-land",
   "grader": "Raw",
   "grade": "EX/NM+",
   "label": "Raw · EX/NM+",
   "market_price_usd": null,
   "market_sales_n": 0,
   "market_window": null,
   "verified_sales": 1,
   "last_verified_sale": {
    "date": "2025-06-25",
    "price_usd": 575,
    "venue": "Heritage Auctions",
    "buyer_premium_included": true,
    "source_url": "https://comics.ha.com/c/search/results.zx?archive_state=5327&auction_name=332526&auction_year=2025&dept=1938&ic4=GalleryView-AuctionNo-051517&mode=archive&sold_status=1526~1524"
   },
   "record_sale": {
    "date": "2025-06-25",
    "price_usd": 575,
    "venue": "Heritage Auctions",
    "buyer_premium_included": true,
    "source_url": "https://comics.ha.com/c/search/results.zx?archive_state=5327&auction_name=332526&auction_year=2025&dept=1938&ic4=GalleryView-AuctionNo-051517&mode=archive&sold_status=1526~1524"
   },
   "population": null,
   "graded_market_value_usd": null
  }
 ],
 "verified_sales": [
  {
   "date": "2026-08-26",
   "version": "Revised Edition dual land",
   "grader": "CGC",
   "grade": "6",
   "price_usd": 875,
   "price": 875,
   "currency": "USD",
   "buyer_premium_included": true,
   "venue": "Heritage Auctions",
   "sale_type": "auction",
   "cert": null,
   "source_url": "https://comics.ha.com/c/search/results.zx?archive_state=5327&auction_name=332634&auction_year=2026&dept=1938&mode=archive&session_desc=3767&sold_status=1526~1524",
   "status": "cross_checked"
  },
  {
   "date": "2026-08-12",
   "version": "Revised Edition dual land",
   "grader": "CGC",
   "grade": "9",
   "price_usd": 843.75,
   "price": 843.75,
   "currency": "USD",
   "buyer_premium_included": true,
   "venue": "Heritage Auctions",
   "sale_type": "auction",
   "cert": null,
   "source_url": "https://www.ha.com/c/search/results.zx?archive_state=5327&dept_child=4419&layout=gallery&mode=archive&page=48~30&sb=5&si=2&sold_status=1526",
   "status": "cross_checked"
  },
  {
   "date": "2026-04-22",
   "version": "Revised Edition dual land",
   "grader": "CGC",
   "grade": "7.5",
   "price_usd": 600,
   "price": 600,
   "currency": "USD",
   "buyer_premium_included": true,
   "venue": "Heritage Auctions",
   "sale_type": "auction",
   "cert": null,
   "source_url": "https://www.ha.com/c/search/results.zx?archive_state=5327&comic_category=2923&comic_grade=~~40t80~94t101&layout=gallery&mode=archive&page=72~59&sb=1&si=2&sold_status=1526",
   "status": "cross_checked"
  },
  {
   "date": "2025-06-25",
   "version": "Revised Edition dual land",
   "grader": "Raw",
   "grade": "EX/NM+",
   "price_usd": 575,
   "price": 575,
   "currency": "USD",
   "buyer_premium_included": true,
   "venue": "Heritage Auctions",
   "sale_type": "auction",
   "cert": null,
   "source_url": "https://comics.ha.com/c/search/results.zx?archive_state=5327&auction_name=332526&auction_year=2025&dept=1938&ic4=GalleryView-AuctionNo-051517&mode=archive&sold_status=1526~1524",
   "status": "cross_checked"
  },
  {
   "date": "2025-06-04",
   "version": "Revised Edition dual land",
   "grader": "Raw",
   "grade": "VG/EX",
   "price_usd": 750,
   "price": 750,
   "currency": "USD",
   "buyer_premium_included": true,
   "venue": "Heritage Auctions",
   "sale_type": "auction",
   "cert": null,
   "source_url": "https://comics.ha.com/c/search/results.zx?archive_state=5327&auction_name=332523&auction_year=2025&dept=1938&ic4=GalleryView-AuctionNo-051517&mode=archive&sold_status=1526~1524",
   "status": "cross_checked"
  }
 ],
 "graded_market_value_usd": null,
 "faq": [
  {
   "q": "How much did a CGC 9 Revised Underground Sea sell for?",
   "a": "A Heritage archive result shows a CGC Mint 9 Revised Underground Sea sold for $843.75 on 2026-08-12 [3].",
   "source_ids": [
    3
   ]
  },
  {
   "q": "What is the card number for Revised Underground Sea?",
   "a": "Current catalog references identify Revised Edition Underground Sea as 3ED #290 [1].",
   "source_ids": [
    1
   ]
  },
  {
   "q": "Is Underground Sea on the Reserved List?",
   "a": "Yes; Wizards of the Coast lists Underground Sea in its official Reserved List policy [2].",
   "source_ids": [
    2
   ]
  },
  {
   "q": "How do I tell Revised from Unlimited Underground Sea?",
   "a": "The Revised copy is a white-border 1994 Revised Edition card cataloged as 3ED #290; confirm the exact set and printing rather than relying on the shared card name [1].",
   "source_ids": [
    1
   ]
  },
  {
   "q": "Are raw sales comparable to graded sales?",
   "a": "Not directly; raw VG/EX or EX/NM+ Heritage results and CGC graded sales should be analyzed in separate comp groups [3,5].",
   "source_ids": [
    3,
    5
   ]
  },
  {
   "q": "How many PSA 10 Revised Underground Seas exist?",
   "a": "A dated, source-stated PSA 10 population was not established in this research pass, so the honest answer is unknown.",
   "source_ids": []
  }
 ],
 "sources": [
  {
   "title": "Underground Sea (3ED) #290",
   "url": "https://mtg.dragonshield.com/card/3ed_290_UndergroundSea",
   "publisher": "Dragon Shield MTG Card Manager"
  },
  {
   "title": "Official Reprint Policy",
   "url": "https://magic.wizards.com/en/news/announcements/official-reprint-policy",
   "publisher": "Wizards of the Coast"
  },
  {
   "title": "Heritage Auctions Search: Revised Dual Lands August 12, 2026",
   "url": "https://www.ha.com/c/search/results.zx?archive_state=5327&dept_child=4419&layout=gallery&mode=archive&page=48~30&sb=5&si=2&sold_status=1526",
   "publisher": "Heritage Auctions"
  },
  {
   "title": "Magic 30th Anniversary Edition Card Image Gallery",
   "url": "https://magic.wizards.com/en/news/card-image-gallery/30th-anniversary-edition",
   "publisher": "Wizards of the Coast"
  },
  {
   "title": "Heritage Auctions Search: Underground Sea Raw June 2025",
   "url": "https://comics.ha.com/c/search/results.zx?archive_state=5327&auction_name=332523&auction_year=2025&dept=1938&ic4=GalleryView-AuctionNo-051517&mode=archive&sold_status=1526~1524",
   "publisher": "Heritage Auctions"
  },
  {
   "title": "Heritage Auctions Search: Underground Sea CGC EX/NM 6 August 26, 2026",
   "url": "https://comics.ha.com/c/search/results.zx?archive_state=5327&auction_name=332634&auction_year=2026&dept=1938&mode=archive&session_desc=3767&sold_status=1526~1524",
   "publisher": "Heritage Auctions"
  },
  {
   "title": "PSA Certification Verification",
   "url": "https://www.psacard.com/cert",
   "publisher": "PSA"
  }
 ],
 "methodology": "https://cardvolume.com/methodology/",
 "cite_as": "Underground Sea 290 (Revised Edition). CardVolume, https://cardvolume.com/magic/revised-edition/underground-sea/ (accessed 2026-09-27)."
}