Modern · 2017
Mewtwo GX (Secret) 78/73
Shining Legends · 2017
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What is Mewtwo GX (Secret) 78/73 worth?
The Mewtwo GX (Secret) 78/73 is a Shining Legends 2017 graded card. Based on 6 verified eBay sold listings from the last 90 days, recent graded examples have sold for $825 to $1,700. PSA 9 examples are the most actively traded grade in this sample, with a recent median around $1,680.
Before you buy
Confirm the exact edition and card number, verify the slab certification with the grader, inspect centering and surface quality, then compare recent sold listings.
The Mewtwo GX (Secret) 78/73 in context
Why collectors care
Shining Legends (2017) was a special-collection set with limited standard booster distribution, and its secret-rare Mewtwo-GX is the chase card. Mewtwo's enduring popularity keeps demand well above the set's other cards.
How to identify it
Number 78/73 from Shining Legends: beyond the 73-card printed total, marking a secret rare. The set also has Mewtwo-GX at 39/73, 72/73 and a rainbow at 76/73, so four Mewtwo-GX variants exist in one set.
Common mistakes
Four different Mewtwo-GX cards in the same set makes number-checking essential. The 39/73 is the common GX and is worth a fraction of the secret rare.
Grade considerations
Centering and surface scratching drive the grade. Special-collection distribution means fewer copies were opened than a mainline set.
Sold price summary
6 verified eBay sales from the last 90 days, grouped by grade.
- Source
- eBay sold listings
- Sample
- 6 sales
- Window
- Last 90 days
- Last checked
- Sep 26, 2026
| Grade | Sales | Median | Range |
|---|---|---|---|
| PSA 9 | 4 | $1,680 | $1,400 to $1,700 |
| CGC 8.5 | 1 | $950 | N/A |
| PSA 8 | 1 | $825 | N/A |
How this summary is built+
Inclusion
All 6 eBay sold (completed) listings we have for this item from the last 90 days, grouped by grader and grade. Asking prices and active listings are never counted.
Outlier handling
Within any grade that has four or more sales, a price below one-third of, or above three times, the within-grade median is set aside before the median is taken. No sales were set aside for this item.
| Grade | Sales | Included | Set aside |
|---|---|---|---|
| PSA 9 | 4 | 4 | 0 |
| CGC 8.5 | 1 | 1 | 0 |
| PSA 8 | 1 | 1 | 0 |
Shipping and fees
Figures are the sale prices as recorded by the marketplace. They are not adjusted for shipping, taxes, or seller fees, so treat them as sale-price reference points, not net-to-seller or all-in buyer costs.
Provenance
Every sale in this summary traces to an individual eBay listing, shown in the sold-listings table lower on this page. Methodology version 2026.1. Read the full methodology.
Mewtwo GX (Secret) 78/73 value FAQ
What is Mewtwo GX (Secret) 78/73 worth?+
Based on 6 verified eBay sold listings from the last 90 days, graded examples have recently sold for $825 to $1,700.
What grade sells most often for Mewtwo GX (Secret) 78/73?+
PSA 9 is the most actively traded grade in the current sample, with 4 sales and a recent median around $1,680.
What is the highest median grade for Mewtwo GX (Secret) 78/73?+
PSA 9 has the highest median in the current sample at about $1,680. Treat this as a sold-comp snapshot, not a guaranteed sale price.
Is Mewtwo GX (Secret) 78/73 worth grading?+
For this card, compare the likely raw value, grading fees, shipping, and the median for the grade you realistically expect. Grading usually makes sense only when the expected graded value clears those costs.
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