Professor's Research

25th Anniversary Collection · #3/28 · None · 2021JPN

$2.37

Market price ▲ 1.3% (1Y)

Prices as of Jul 26, 2026

Mirror Holofoil Reverse Holofoil

213graded pop

77%gem rate

9.5×PSA 10 vs raw

-51%off ATH $4.64 · Feb 2024

−$6.66EV to grade — don't

Printings & price history

Mirror Holofoil▼ 0.4% 7d$2.37

Low $1.55Mid $2.48High $5.00

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Graded values

updated 2026-07-26

Grade 6 est.$2.16

Grade 5 est.$1.82

Grade 4 est.$1.50

Grade 3 est.$1.25

Grade 2 est.$1.02

Grade 1 est.$0.86

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$22.50

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

Graded population census · updated 2026-07-09

PSA47 graded · 23 gem 10

12345678910

CGC34 graded · 30 gem 10

12345678910

Population data from PriceCharting, updated monthly.

How much is Professor's Research #3/28 worth?

A raw copy of Professor's Research #3/28 (25th Anniversary Collection, 2021) is worth about $2.37 right now, based on the latest market data from July 26, 2026. Across the 2 printings we track, copies run anywhere from $1.55 to $5.00 depending on the version you're holding.

Grading changes the math on this one: a PSA 10 is valued around $22.50, roughly 9.5x the raw price, while a PSA 9 sits near $14.86. 75 copies have been graded to date, and 77% of them came back a 10 — worth knowing before you pay grading fees.

These figures come from nightly market-data syncs verified against completed sales. Use the chart above to see the trend before you buy or sell.