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Altered Beast (Genesis) — Price Guide & Live Deals

Current Sega Genesis Altered Beast deals across loose and CIB, what a fair asking price looks like, and which listings to skip.

Right now: Loose prices roughly flat over 90 days, 48 current qualifying listings.

Median ask
$17
Loose · n=91
Listings now
48
qualifying right now
90-day Loose median trend
-2.9%
vs 90 days ago

Current qualifying listings

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Sega Altered Beast (1989) Sega Genesis 16-Bit Beat 'Em Up Cartridge w/ Manual
Sega Altered Beast (1989) Sega Genesis 16-Bit Beat 'Em Up Cartridge w/ Manual
ebayGood

$10.50 USD

★ 100% · 1,623 ratings

Listed today · checked 2h ago

Altered Beast (Sega Genesis, 1989) tested working complete
Altered Beast (Sega Genesis, 1989) tested working complete
ebayAcceptable

$16.99 USD

+$8.49 shipping

★ 99.9% · 2,359 ratings

Listed today · checked 8h ago

Altered Beast 1989 For The Sega Genesis Retro Video Game Cartridge Only
Altered Beast 1989 For The Sega Genesis Retro Video Game Cartridge Only
ebayGood

$8.99 USD

+$5.49 shipping

★ 100% · 464 ratings

Listed yesterday · checked yesterday

Altered Beast Sega Genesis Loose Tested Working
Altered Beast Sega Genesis Loose Tested Working
ebayVery Good

$11.99 USD

★ 100% · 1,061 ratings

Listed 2 days ago · checked 2 days ago

Altered Beast Sega Genesis Loose Tested Working
Altered Beast Sega Genesis Loose Tested Working
ebayVery Good

$11.99 USD

★ 100% · 1,061 ratings

Listed 2 days ago · checked 2 days ago

Altered Beast Sega Genesis Game and Box only Tested Working
Altered Beast Sega Genesis Game and Box only Tested Working
ebayVery Good

$24.99 USD

★ 100% · 1,061 ratings

Listed 2 days ago · checked 2 days ago

Altered Beast Sega Genesis 1989 CIB Complete with Manual and Case
Altered Beast Sega Genesis 1989 CIB Complete with Manual and Case
ebayVery Good

$24.99 USD

Free shipping

★ 99.9% · 2,543 ratings

Listed 3 days ago · checked 3 days ago

SEGA Altered Beast Video Game Cartridge Only for Sega Genesis
SEGA Altered Beast Video Game Cartridge Only for Sega Genesis
ebayGood

$10.00 USD

★ 100% · 98 ratings

Listed 4 days ago · checked 4 days ago

Altered Beast For Sega Genesis Great Condition Complete CIB
Altered Beast For Sega Genesis Great Condition Complete CIB
ebayVery Good

$35.00 USD

Shipping calculated

★ 100% · 1,935 ratings

Listed 5 days ago · checked 5 days ago

Altered Beast (Sega Genesis, 1989) Complete- CIB-Cleaned-Tested-READ!
Altered Beast (Sega Genesis, 1989) Complete- CIB-Cleaned-Tested-READ!
ebayGood

$27.95 USD

Free shipping

★ 100% · 185 ratings

Listed 5 days ago · checked 5 days ago

Altered Beast Complete with Case, Game Cart & Manual for Sega Genesis
Altered Beast Complete with Case, Game Cart & Manual for Sega Genesis
ebayVery Good

$34.88 USD

Free shipping

★ 99.7% · 341 ratings

Listed 6 days ago · checked 6 days ago

Altered Beast (Sega Genesis) CIB TESTED AND WORKING!
Altered Beast (Sega Genesis) CIB TESTED AND WORKING!
ebayVery Good

$30.00 USD

Shipping calculated

★ 99.8% · 8,111 ratings

Listed 7 days ago · checked 7 days ago

About 1.4 qualifying listings appear per day on average.

Asking-price ranges by condition

Condition Min 25% Median 75% Max N
Loose $8.90 $11.99 $16.99 $20.90 $45.00 91
Cib $16.99 $25.00 $30.00 $38.26 $218.00 45

Asking prices of currently-active listings. Not sold-price data.

90-day Loose median trend
-2.9%
vs 90 days ago

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How we filter

Every feed has its own filter, tuned by hand for this one game. Before any change goes live, those filters are tested against thousands of real eBay listing titles. Every night, each feed is checked against every other deal page in its category, so a listing for a different game that slips in gets flagged and fixed instead of quietly shown.

Of the 98 listings we observed for this game in the last 30 days, we filtered out 56 of 98 (~57%) for quality reasons. The remaining 42 are what we'd actually surface.

  • 43 matched a bootleg / out-of-scope keyword
  • 5 seller had too few feedback ratings
  • 4 caught by a junk-listing guard
  • 4 shipped from a region we exclude

What the feed excludes

An eBay search for Altered Beast (Genesis) returns far more than the game itself: controllers, T-shirts, strategy guides, imports and repro carts all mention it in their titles. These are the 101 terms we filter out to keep this feed to the real thing. A listing whose title contains any of them never reaches the feed, the price table or an alert. Many look unrelated to Altered Beast (Genesis) because they are: that's the noise.

Other titles & look-alikes 13
  • -mega drive
  • -reprint
  • -playstation
  • -guardian of the realms
  • -wrath of the
  • -sega master
  • -playset
  • -model 1
  • -model 2
  • -commodore
  • -c64
  • -diorama
  • -re-po
Bootlegs & repros 5
  • -custom case
  • -repro
  • -reproduction
  • -aftermarket
  • -repo
Broken, untested & empty listings 15
  • -for parts
  • -not working
  • -non-working
  • -non working
  • -broken
  • -as is
  • -as-is
  • -untested
  • -doesnt work
  • -does not work
  • -not tested
  • -parts only
  • -no game
  • -game not included
  • -cart not included
Imports & regions 7
  • -japanese
  • -ntsc-j
  • -famicom
  • -jpn
  • -jp
  • -pal
  • -japan
Ports, remakes & re-releases 2
  • -ps3
  • -xbox 360
Lots & multi-item listings 8
  • -lot
  • -bundle
  • -collection
  • -set of
  • -multiple games
  • -3 games
  • -4 games
  • -5 games
Accessories, merch & paper 51
  • -controller
  • -headset
  • -headphones
  • -plush
  • -figure
  • -figurine
  • -keychain
  • -sticker
  • -charger
  • -cable
  • -adapter
  • -backpack
  • -wallet
  • -shirt
  • -hoodie
  • -jersey
  • -poster
  • -art book
  • -artbook
  • -soundtrack
  • -vinyl
  • -statue
  • -amiibo
  • -funko
  • -pop figure
  • -mousepad
  • -lanyard
  • -badge
  • -trading cards
  • -tcg booster
  • -bookmark
  • -instruction booklet
  • -promo item
  • -promotional
  • -insert only
  • -flyer
  • -pamphlet
  • -display card
  • -demo cart
  • -kiosk
  • -case only
  • -case-only
  • -clamshell only
  • -box and case
  • -replacement box only
  • -console heroes
  • -insert cover
  • -nfr
  • -hat
  • -pin
  • -ost

How often qualifying deals appear

  • 11 in the last 7 days (~1.57/day)
  • 43 in the last 30 days (~1.43/day)
  • 43 in the last 90 days (~0.48/day)

Altered Beast: collector & reseller spec sheet

  • Save mechanism: none. It's a straight arcade port with no save battery, so there is no battery to fail. A "tested" cart that boots and plays is the whole check.
  • Product code: check that the label and case say Sega Genesis and match the US release. The product code is not listed here because it isn't in our verified facts file.
  • Print variants: an early-run retail print and later budget reprints exist, and they can differ in packaging and case design. A reprint usually sells for less than an early copy, but we haven't confirmed the exact markings, so compare against a known authentic photo.
  • Same-name confusion: Altered Beast also shipped on Master System, PC Engine and other platforms. The feed rejects those by name, but a listing that only says "Altered Beast" with a Genesis-looking cart photo is worth a question to the seller.- Asking-price traps: many sellers list Genesis games with "CIB" in the title when the manual or case is missing. Read the photo set before trusting the label. Prices shown are asking prices, not sold prices.

Buying Sega Genesis games: what to check by condition

These checks apply to every Sega Genesis cartridge. The item notes above cover what is specific to this game.

Loose

  • Compare the label, shell color and front/back markings against a photo of a known-authentic cart. Repro labels are often glossier, blurrier or slightly off-color.
  • Ask for a photo of the board or the back of the cart. An opened shell is not automatically bad (battery swaps are normal), but it should be disclosed.
  • If the game saves to a battery, ask whether the save holds. Old save batteries fail with age regardless of what the listing says, so budget for a replacement.

CIB (complete in box)

  • Confirm the box, manual and plastic case and cover art are all shown in the photos, not just listed in the title.
  • Check that the box and manual are the same region and print as the cart. Mixed-and-matched "complete" copies are common.
  • Box wear (crushing, tears, sticker residue) moves price far more than the cart does. Judge it from photos, not from the word "mint".

Sealed & graded

  • For a graded copy, look the certification number up on the grading company's own site and confirm the photos match the slab you are buying.
  • For an ungraded sealed copy, compare the wrap and seal pattern against a known factory-sealed example. Resealing is common, and a reseal on a loose game is worth a loose price.
  • Ask for photos of every side, the seams and any price stickers. Refusing extra photos on a sealed listing is a red flag on its own.

FAQ

How much is Altered Beast (Genesis) worth right now?
CresvaMent's daily eBay index puts the median asking price for Altered Beast (Genesis) in Loose condition at $17 across 91 active US listings (November 6, 2026 snapshot). Asking prices, not sold prices.
How do I get notified when a new Altered Beast (Genesis) listing comes in under my price?
Live eBay listings for Altered Beast (Genesis) are at cresvament.com/deals/genesis/altered-beast, and CresvaMent can alert you by Discord or email when a new one is listed under your max price (free for one tracker).
How often do qualifying deals appear?
In the trailing 30 days, 43 qualifying listings appeared — roughly 1.43 per day.
Is Altered Beast (Genesis) reproduced or commonly faked?
In the last 30 days we excluded 43 listings for matching reproduction / out-of-scope keywords. The article above covers what to look for when verifying authenticity.

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Data freshness: last snapshot 2026-11-06 00:00 UTC . Atom feed

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