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PSA 10: Median of 30 sales, last 45 days · newest Oct 23, 2026 · checked Oct 25, 2026
PSA 9: Median of 28 PSA 9 sales in the last 90 days, latest 2026-10-24. Grade 9 guide (all graders): $1,500.
Grade 7 and Grade 8 are PriceCharting guides across all graders (PSA, CGC, BGS, SGC, TAG).
GemDelta shows Mewtwo GX (Shining Legends #78) at $823 market price (TCGplayer market). Its Delta multiple is 9.98x.
A PSA 10 Mewtwo GX (Shining Legends #78) is currently shown at $8,212, the median of 30 PSA 10 sales in the last 45 days (newest Oct 23, 2026).
GemDelta records a 15.7% gem rate for Mewtwo GX (Shining Legends #78), with 2,782 PSA 10 copies out of 17,706 total PSA grades and a 9.98x Delta. That describes the grading profile; it is not financial advice.
| Date | Listing | Sale |
|---|---|---|
| Oct 23, 2026 | 2017 Pokemon Sun & Moon Shining Legends Full Art Mewtwo GX #78 PSA 10 GEM MINT FIXED [Fanatics] | $8225.00 |
| Oct 21, 2026 | 2017 POKEMON SUN & MOON SHINING LEGENDS SECRET #78 MEWTWO GX PSA 10 #78 | $8225.00 |
| Oct 19, 2026 | 2017 Pokemon Sun & Moon Shining Legends Secret #78 Mewtwo GX - PSA GEM MT 10 [Goldin] | $8915.76 |
| Oct 18, 2026 | 2017 Pokemon Shining Legends Mewtwo Secret Rare #78/73 PSA 10 GEM MINT | $7201.00 |
| Oct 15, 2026 | Pokemon Mewtwo GX #78 Shining Legends PSA Trading Card Game Gem Mint 10 (The Pokemon Company, 2017) Secret Rare, Holo... | $8438.00 |
| Oct 15, 2026 | 2017 Pokemon Sun & Moon Shining Legends Secret #78 Mewtwo GX PSA 10 GEM MINT | $8733.00 |
| Oct 14, 2026 | Pokemon 2017 Test Tube Mewtwo GX 78/73 Shining Legends GEM MINT PSA 10 #78 | $8500.00 |
| Oct 10, 2026 | Mewtwo GX 78 Shining Legends Pokemon Card PSA 10 78/73 | $8500.00 |
| Oct 9, 2026 | 2017 POKEMON SUN & MOON SHINING LEGENDS SECRET #78 MEWTWO GX PSA 10 #78 | $8065.00 |
| Oct 9, 2026 | 2017 Pokemon Sun & Moon Shining Legends Alt Art Mewtwo GX #78 PSA 10 GEM MINT FIXED [Fanatics] | $8300.00 |
| Oct 8, 2026 | POKEMON MEWTWO GX 2017 S&M SHINING LEGENDS #78 SECRET PSA 10 #78 | $9999.00 |
| Oct 6, 2026 | 2017 Pokemon Sun & Moon Shining Legends Full Art Mewtwo GX #78 PSA 10 GEM MINT FIXED [Fanatics] | $8100.00 |
Showing the latest 12 of 30 stored PSA 10 comps.