Koby (Treasure Cup) One Piece Promotion Cards C One Piece card — value and price

Koby (Treasure Cup)

One Piece Promotion Cards · C
One Piece op:535277 TCGplayer (daily snapshot, 2026-09-08)
Fair market value
$599.90
Consensus of 1 market price guide. Typical $519.63 – $683.29.
▲ 50% · 47d
Sources: TCGplayer (daily snapshot, 2026-09-08) · Near Mint, raw
Optimal buy
$555.63
Never pay above $579.98
Optimal sell
$632.89
Never sell below $609.80
Buy this card · slabbed copies dominate at this price · aim to pay under $579.98 raw
Buy graded (PSA 10) →Find on eBay →TCGplayer →Amazon: sealed →
When it arrives: if it's graded, a slab guard protects the case (and the grade with it); if it's raw, use a sleeve inside a magnetic one-touch. Either way, keep it out of sunlight.
Slab guard (graded)Magnetic one-touch (raw)Penny sleeves

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Selling this card
Optimal sell $632.89 · never below $609.80. Value your copy for the live net-after-fees calculator.
Where to sell
eBay~13.25% + $0.30Largest audience; on any listing use “Sell one like this” to prefill yours.TCGplayer~10–11%Best for singles; buyers expect competitive, data-driven pricing.
Shipping & protection supplies
High value — graded: slab in a slab guard, bubble-wrapped in a rigid mailer. Raw: sleeve + one-touch (or toploader) inside a rigid mailer. Either way ship tracked, with signature confirmation.
Slab guard (graded)Penny sleevesMagnetic one-touch holderToploadersBubble mailersRigid/cardboard mailerPainter’s tape

Amazon Business Free to join and gives bulk pricing on sleeves, toploaders and mailers — worth it if you ship cards often.

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Common questions
How much is Koby (Treasure Cup) worth?

Koby (Treasure Cup) from One Piece Promotion Cards has a fair market value of about $599.90 (Near Mint, raw), based on a consensus of current market price guides.

What is the best price to sell Koby (Treasure Cup)?

List around $632.89 to clear without leaving money on the table; that nets about $535.21 after fees and shipping.

What should I pay to buy Koby (Treasure Cup)?

A disciplined buy target is about $555.63 — a discount to fair value that keeps an edge. Aim not to pay above $579.98.

Where can I buy Koby (Treasure Cup)?

Koby (Treasure Cup) is sold on eBay, TCGplayer, and Amazon. Compare live listings against the fair value of $599.90 and aim to pay under $579.98 — SplitShot links you straight to current listings at each marketplace.

Is now a good time to buy Koby (Treasure Cup)?

Koby (Treasure Cup) is trending stable lately. A disciplined entry is under $579.98; paying near or below $555.63 keeps a margin of safety versus the $599.90 fair value.

Is a PSA 10 Koby (Treasure Cup) worth the premium?

A PSA 10 Koby (Treasure Cup) is modelled around $1,259.79 versus $599.90 raw — roughly a 110% premium for a current (2020+) card. At this value most copies trade slabbed, because certification removes both authenticity and condition risk. Buy graded if you want certainty or plan to resell; buy raw only from clear photos and a trusted seller, and expect to pay near $579.98 at most. Graded figures are model estimates, not comps.

Estimate for guidance, not an appraisal. Value your exact copy →