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PSA 10: 1 sale, last 45 days · Oct 13, 2026 · checked Oct 27, 2026
PSA 9: Median of 1 PSA 9 sale in the last 90 days, latest 2026-09-27. Grade 9 guide (all graders): $20.
Grade 7 and Grade 8 are PriceCharting guides across all graders (PSA, CGC, BGS, SGC, TAG).
GemDelta shows Professor's Research (Sword & Shield #209) at $4.15 market price (TCGplayer market). Its Delta multiple is 9.64x.
A PSA 10 Professor's Research (Sword & Shield #209) is currently shown at $39.99, the only PSA 10 sale in the last 45 days (Oct 13, 2026).
GemDelta records a 61.1% gem rate for Professor's Research (Sword & Shield #209), with 433 PSA 10 copies out of 709 total PSA grades and a 9.64x Delta. That describes the grading profile; it is not financial advice.
| Date | Listing | Sale |
|---|---|---|
| Oct 13, 2026 | PSA 10 Professor's Research Sword & Shield Base Set 209/202 Pokemon Card B16 | $39.99 |
| Aug 23, 2026 | Pokemon Professor's Research 209 Sword & Shield Secret Rare Full Art PSA 10 #209 | $46.82 |
| May 30, 2026 | PSA 10 GEM MINT 2020 Pokemon SWSH Full Art Secret Professor's Research #209 #209 | $33.00 |