Best Steam Siege Cards to Grade
The Steam Siege cards worth grading, ranked by expected profit per submission — every grade outcome weighted by how often the card actually receives it — after current grading fees. The PSA 10 best case is shown on every row but does not decide the order. Top pick: Gardevoir-EX at an expected +$417.
Ranked by expected profit 15
| # | Card | Raw | PSA 9 | PSA 10 | Cost | Best case | Gem rate | Expected | Sample |
|---|---|---|---|---|---|---|---|---|---|
| 1 |  Gardevoir-EXSteam Siege #116 · Modern (2011–2019)Expected +$417 per submission: 21% of 3,806 graded copies came back PSA 10 ($2,350), and a PSA 9 ($234) still clears the $329 you have in it. Confidence high on that sample. | $86 | $234 | $2,350 | $243 | +$2,022 | 21% | +$417 | 3,806 high |
| 2 |  Volcanion-EXSteam Siege #115 · Modern (2011–2019)Expected +$218 per submission: 27.2% of 1,859 graded copies came back PSA 10 ($1,100), and only a PSA 10 covers the $156 you have in it — a 9 loses money. Confidence high on that sample. | $45 | $97 | $1,100 | $111 | +$944 | 27.2% | +$218 | 1,859 high |
| 3 |  Steelix-EXSteam Siege #108 · Modern (2011–2019)Expected +$151 per submission: 22% of 1,762 graded copies came back PSA 10 ($1,000), and only a PSA 10 covers the $110 you have in it — a 9 loses money. Confidence high on that sample. | $20 | $60 | $1,000 | $90 | +$890 | 22% | +$151 | 1,762 high |
| 4 |  Volcanion-EXSteam Siege #107 · Modern (2011–2019)Expected +$129 per submission: 29.7% of 1,069 graded copies came back PSA 10 ($657), and only a PSA 10 covers the $96 you have in it — a 9 loses money. Confidence high on that sample. | $9 | $45 | $657 | $87 | +$561 | 29.7% | +$129 | 1,069 high |
| 5 |  Hydreigon BREAKSteam Siege #87 · Modern (2011–2019)Expected +$121 per submission: 48.6% of 294 graded copies came back PSA 10 ($399), and only a PSA 10 covers the $90 you have in it — a 9 loses money. Confidence high on that sample. | $6 | $40 | $399 | $84 | +$309 | 48.6% | +$121 | 294 high |
| 6 |  M Gardevoir-EXSteam Siege #112 · Modern (2011–2019)Expected +$120 per submission: 33% of 4,149 graded copies came back PSA 10 ($582), and only a PSA 10 covers the $128 you have in it — a 9 loses money. Confidence high on that sample. | $42 | $105 | $582 | $86 | +$454 | 33% | +$120 | 4,149 high |
| 7 |  Gardevoir-EXSteam Siege #111 · Modern (2011–2019)Expected +$112 per submission: 27.9% of 1,885 graded copies came back PSA 10 ($653), and only a PSA 10 covers the $107 you have in it — a 9 loses money. Confidence high on that sample. | $20 | $60 | $653 | $87 | +$546 | 27.9% | +$112 | 1,885 high |
| 8 |  Yveltal BREAKSteam Siege #66 · Modern (2011–2019)Expected +$80 per submission: 53.2% of 344 graded copies came back PSA 10 ($290), and only a PSA 10 covers the $90 you have in it — a 9 loses money. Confidence high on that sample. | $7 | $41 | $290 | $83 | +$200 | 53.2% | +$80 | 344 high |
| 9 |  M Steelix-EXSteam Siege #109 · Modern (2011–2019)Expected +$44 per submission: 30.7% of 2,310 graded copies came back PSA 10 ($400), and only a PSA 10 covers the $107 you have in it — a 9 loses money. Confidence high on that sample. | $23 | $48 | $400 | $84 | +$293 | 30.7% | +$44 | 2,310 high |
| 10 |  Magearna-EXSteam Siege #110 · Modern (2011–2019)Expected +$36 per submission: 31.1% of 823 graded copies came back PSA 10 ($331), and only a PSA 10 covers the $92 you have in it — a 9 loses money. Confidence high on that sample. | $9 | $45 | $331 | $83 | +$239 | 31.1% | +$36 | 823 high |
| 11 |  M Gardevoir-EXSteam Siege #79 · Modern (2011–2019)Expected +$4 per submission: 35% of 2,711 graded copies came back PSA 10 ($230), and only a PSA 10 covers the $102 you have in it — a 9 loses money. Confidence high on that sample. | $20 | $49 | $230 | $82 | +$128 | 35% | +$4 | 2,711 high |
| 12 |  Gardevoir-EXSteam Siege #78 · Modern (2011–2019)Expected loss −$12 per submission: 38.4% of 466 graded copies came back PSA 10 ($152), and only a PSA 10 covers the $88 you have in it — a 9 loses money. Confidence high on that sample. | $6 | $35 | $152 | $82 | +$65 | 38.4% | −$12 | 466 high |
| 13 |  Xerneas BREAKSteam Siege #82 · Modern (2011–2019)Expected loss −$17 per submission: 43.7% of 268 graded copies came back PSA 10 ($138), and only a PSA 10 covers the $88 you have in it — a 9 loses money. Confidence high on that sample. | $7 | $28 | $138 | $81 | +$49 | 43.7% | −$17 | 268 high |
| 14 |  M Steelix-EXSteam Siege #68 · Modern (2011–2019)Expected loss −$25 per submission: 41.6% of 1,256 graded copies came back PSA 10 ($124), and only a PSA 10 covers the $91 you have in it — a 9 loses money. Confidence high on that sample. | $10 | $29 | $124 | $81 | +$33 | 41.6% | −$25 | 1,256 high |
| 15 |  Professor SycamoreSteam Siege #114 · Modern (2011–2019)Expected loss −$28 per submission: 34.8% of 1,003 graded copies came back PSA 10 ($160), and only a PSA 10 covers the $96 you have in it — a 9 loses money. Confidence high on that sample. | $14 | $20 | $160 | $82 | +$64 | 34.8% | −$28 | 1,003 high |
Expected = every grade outcome weighted by its share of the card's graded population, minus the raw price and the grading cost (PSA tier fee for the graded value plus ~$20 round-trip shipping, fees as of 2026-09-26). Best case is the PSA 10 leg alone. Gem rates come from a self-selected population — collectors grade their cleanest copies — so read them as an upper bound. Raw is a blended market price, not a sale of your copy. Full method and filters on the grading index.
How to read the Steam Siege ranking
Every Steam Siege card listed here clears one bar: its PSA 10 price beats its raw price by more than the cost of grading it. 15 cards from the set pass. 15 of them (100%) have a gem-rate sample of at least ten graded copies in the population reports, and 11 of those keep a positive expected value once every grade outcome is weighted by how often the card actually receives it.
The order is expected profit, not the PSA 10 best case, which rewards the widest raw-to-gem gap whether the card gems one time in two or one in fifty. Here the top row, the Gardevoir-EX from Steam Siege, gems 21% of the time across 3,806 graded copies: +$417 is what a long run of submissions would average, $2,022 is what one lucky copy returns.
The median gem rate across the sampled Steam Siege cards is 33%. Roughly one submitted copy in 3 came back PSA 10, and most rows here need that PSA 10 to cover raw price plus fee, so the gem rate decides whether a submission pays. Of the 15 ranked cards, 1 still covers raw price plus fee at PSA 9, 14 need a 10 to break even and 4 lose money on expectation. 15 rest on a hundred or more graded copies.
Before you submit a Steam Siege card
Grading pays on condition. The four things every grader scores — centering, corners, edges and surface — can be checked at home before paying a fee, and a copy that is visibly off-centre or has a whitened corner will not gem whatever the population says. Those gem rates come from a self-selected population of clean copies, so a random copy does worse.
The cost column assumes a PSA submission at the tier covering the card's PSA 10 value, fees as of 2026-09-26, and raw is CardTrack's blended near-mint price, not a sale of your copy: pay more, or hold a lighter copy, and the break-even moves against you. Test a card with your own numbers in the ROI calculator, see the printings that fail the bar on the Steam Siege card list, or see how gem-mint premiums run across the whole catalogue on the PSA premium index.