What is the starting price for an ungraded Cloyster [Blue Back] #91?

An ungraded copy of Cloyster [Blue Back] #91 is currently valued around $6.

How much is a PSA 10 graded version of this card worth?

A PSA 10 graded version of Cloyster [Blue Back] #91 is listed at $299.

Where can I find this Cloyster card?

This card is from the Pokémon Japanese Topsun set and is available on our marketplace.

Cloyster [Blue Back] #91 — Pokémon Japanese Topsun Card Value

Name: Cloyster [Blue Back] #91 — Pokémon Japanese Topsun Card Value
Brand: Pokémon

Pokémon Japanese Topsun

What the Cloyster [Blue Back] #91 card from Pokémon Japanese Topsun is worth — ungraded and graded (PSA 10).

Cloyster [Blue Back] #91 value — Ungraded $6 · Grade 9 $60 · PSA 10 $299. Prices updated July 2026.

Set · Pokémon Japanese TopsunGame · Pokémon

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Value by grade

Ungraded

10.0×

$60

Grade 9

49.8×

$299

PSA 10

Real sold prices per grade — the PSA 10 premium on this card is 49.8× raw.

Complete-in-box price history

Monthly CIB value, based on sold comps.

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Which version do you have?

For the cheapest way to own Cloyster #91, buy either the Blue Back or Green Back version at $6. Since both versions share the same basic value, neither offers a significant premium in edition or scarcity over the other. Buyers prioritizing budget should purchase either version, while those seeking a perceived collectible edge should consider the slight difference in aesthetics, though the price difference is currently zero.

VersionUsedNewBuy

Blue Back— this pageCloyster [Blue Back] #91 — Pokémon Japanese Topsun Card Value$6.23$299.35eBay ↗

Green BackCloyster [Green Back] #91 — Pokémon Japanese Topsun Card Value$5.54$245.25eBay ↗

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Price data verified against · 1

PriceCharting — Cloyster [Blue Back] #91 (Pokémon Japanese Topsun)$6.23

Item details

Brand: Pokémon
Set: Pokémon Japanese Topsun
Game: Pokémon

Cloyster [Blue Back] #91 (Pokémon Japanese Topsun) card value

An ungraded Cloyster [Blue Back] #91 from Pokémon Japanese Topsun averages around $6. A Grade 9 copy runs about $60, and a PSA 10 gem-mint commands $299.

What drives the price

Centering, corners, edges, and surface decide a card's grade — and the grade decides the price. The jump from raw to PSA 10 can be 5–20×, so condition is everything. Holos, first editions, and shadowless prints carry the biggest premiums.

Price guide

Sold values by grade vs. what sellers ask today

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Condition	Value	Based on
Ungraded	$6	eBay sold comps
Grade 9	$60	eBay sold comps
PSA 10	$299	eBay sold comps

Frequently asked questions

What is the starting price for an ungraded Cloyster [Blue Back] #91?: An ungraded copy of Cloyster [Blue Back] #91 is currently valued around $6.
How much is a PSA 10 graded version of this card worth?: A PSA 10 graded version of Cloyster [Blue Back] #91 is listed at $299.
Where can I find this Cloyster card?: This card is from the Pokémon Japanese Topsun set and is available on our marketplace.