Professor's Research

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

$2.42

Market price ▼ 9.0% (30d)

Prices as of Jul 27, 2026

SupporterArt · Yuu Nishida

920graded pop

34%gem rate

23.7×PSA 10 vs raw

-55%off ATH $6.39 · Aug 2022

+$1.18EV to grade — marginal

Price history

Holofoil▲ 5.2% 7d$2.42

Low $1.23Mid $3.00

Loading chart…

Buy it now on eBay

Loading live listings…

Live from eBay · affiliate links support CardPrice · see recent sold results →

Shop live eBay listings →Recent eBay sold results

Graded values

updated 2026-07-27

Grade 6 est.$2.76

Grade 5 est.$2.33

Grade 4 est.$1.92

Grade 3 est.$1.60

Grade 2 est.$1.31

Grade 1 est.$1.11

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$57.32

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 $2.42 ungraded.

Grading changes the math on this one: a PSA 10 is valued around $57.32, roughly 23.7x 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.