Professor's Research

SWSH Black Star Promos · #SWSH152/307 · Promo · 2019

$2.67

Market price ▲ 5.1% (30d)

Prices as of Aug 14, 2026

SupporterArt · Yuu Nishida

920graded pop

34%gem rate

24.0×PSA 10 vs raw

-52%off ATH $6.39 · Aug 2022

+$3.24EV to grade — marginal

Market data

Price history

Holofoil▲ 6.4% 7d

Low $1.75Mid $3.08

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Live listings

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Graded market

Graded values

PSA 10 report →updated 2026-08-14

Grade 6 est.$2.91

Grade 5 est.$2.45

Grade 4 est.$2.02

Grade 3 est.$1.68

Grade 2 est.$1.38

Grade 1 est.$1.16

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$64.19

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

Graded population census · updated 2026-07-09

PSA920 graded · 310 gem 10

12345678910

Population data from PriceCharting, updated monthly.

How much is Professor's Research #SWSH152/307 worth?

Professor's Research #SWSH152/307 is a Promo card from SWSH Black Star Promos (2019) — today it trades at roughly $2.67 ungraded.

Grading changes the math on this one: a PSA 10 is valued around $64.19, roughly 24.0x the raw price, while a PSA 9 sits near $14.00. 920 copies have been graded to date, and 34% of them came back a 10 — worth knowing before you pay grading fees.

Prices on this page refresh nightly from live TCGplayer market data and are cross-checked against actual sold prices, so a single inflated listing never becomes "the price". The chart above has the full history.

Collecting SWSH Black Star Promos?Full master set guide — every card, chase list, and completion cost→