Tentacool

Mystery of the Fossils · #promo · Common · 1997JPN

$0.66

Market price ▼ 1.5% (30d)

Prices as of Aug 14, 2026

509graded pop

34%gem rate

277.4×PSA 10 vs raw

-17%off ATH $2.40 · Jul 2026

+$50.40EV to grade — worth it

Market data

Price history

Normal▲ 0.0% 7d

Low $0.20Mid $0.68

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Live listings

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Graded market

Graded values

PSA 10 report →updated 2026-08-13

Grade 6 est.$1.89

Grade 5 est.$1.59

Grade 4 est.$1.31

Grade 3 est.$1.09

Grade 2 est.$0.90

Grade 1 est.$0.76

Grades 1–6 are estimates modeled from the raw price — PSA/CGC/BGS 7–10 and Ungraded are live tracked market values.

PSA 10 price history$183.06

PSA 10 chart is building — graded values are tracked nightly, a new point appears each day.

Graded population census · updated 2026-08-02

CGC275 graded · 105 gem 10

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PSA234 graded · 70 gem 10

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Population data from PriceCharting, updated monthly.

How much is Tentacool #promo worth?

A raw copy of Tentacool #promo (Mystery of the Fossils, 1997) is worth about $0.66 right now, based on the latest market data from August 14, 2026.

Grading changes the math on this one: a PSA 10 is valued around $183.06, roughly 277.4x the raw price, while a PSA 9 sits near $20.00. 275 copies have been graded to date, and 38% of them came back a 10 — worth knowing before you pay grading fees.

We update this valuation every night from live market data and verify it against real completed sales — see the chart above for how Tentacool has moved over time.

Collecting Mystery of the Fossils?Full master set guide — every card, chase list, and completion cost→