Schoolboy

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

$3.42

Market price ▼ 4.7% (30d)

Prices as of Sep 25, 2026

136graded pop

88%gem rate

7.6×PSA 10 vs raw

-66%off ATH $9.99 · May 2022

−$3.36EV to grade — don't

Market data

Price history

Holofoil▲ 0.0% 7d

Low $2.40Mid $3.41High $5.00

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Live listings

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Graded market

Graded values

PSA 10 report →updated 2026-09-25

Grade 6 est.$3.07

Grade 5 est.$2.58

Grade 4 est.$2.13

Grade 3 est.$1.78

Grade 2 est.$1.45

Grade 1 est.$1.23

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$26.10

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

Graded population census · updated 2026-09-18

PSA97 graded · 89 gem 10

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CGC39 graded · 31 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 $3.42 right now, based on the latest market data from September 25, 2026.

Grading changes the math on this one: a PSA 10 is valued around $26.10, roughly 7.6x the raw price, while a PSA 9 sits near $17.24. 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.

Collecting Blue Sky Stream?Full master set guide — every card, chase list, and completion cost→