Schoolboy

Blue Sky Stream · #78/67 · Super Rare · 2021JPN

$3.59

Market price ▼ 18.0% (1Y)

Prices as of Jul 26, 2026

133graded pop

90%gem rate

6.0×PSA 10 vs raw

-63%off ATH $9.99 · May 2022

−$7.30EV to grade — don't

Price history

Holofoil▲ 0.0% 7d$3.59

Low $2.50Mid $3.59High $9.69

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Graded values

updated 2026-07-26

Grade 6 est.$3.52

Grade 5 est.$2.97

Grade 4 est.$2.45

Grade 3 est.$2.04

Grade 2 est.$1.67

Grade 1 est.$1.41

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$21.65

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

Graded population census · updated 2026-07-08

PSA97 graded · 89 gem 10

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CGC36 graded · 30 gem 10

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Population data from PriceCharting, updated monthly.

How much is Schoolboy #78/67 worth?

A raw copy of Schoolboy #78/67 (Blue Sky Stream, 2021) is worth about $3.59 right now, based on the latest market data from July 27, 2026.

Grading changes the math on this one: a PSA 10 is valued around $21.65, roughly 6.0x the raw price, while a PSA 9 sits near $18.23. 97 copies have been graded to date, and 92% 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 Schoolboy has moved over time.