Know your edge
before you submit.
Stop guessing which cards are worth grading. GemScore reads every card on profitability, gem rate, liquidity, and net-of-fees profit. One honest number, before you ship.
Four signals, one number.
Net of every fee, every time.
Sale price minus eBay's 13.25%, your grading tier, raw cost, and shipping. The number that actually lands in your bank, not a sticker price.
The probability your card grades clean.
Historical PSA 10 rate for this set and rarity, blended with print-quality patterns. Not a guess, a population-derived odds line.
Will it actually sell?
Real comp volume. A great theoretical price doesn't matter if no one's buying.
The gap between raw and gem.
Raw to PSA 10 differential. This is the move you get paid for. Wide spreads carry the misses; thin spreads mean the upside is already in the raw price.
Honest math. Honest results.
We subtract every fee. Every time.
Most tools subtract grading fees from PSA 10 prices and call it "profit." Some forget eBay's 13.25%. Most forget shipping. We don't. GemEdge nets every cost (grading tier, eBay take, shipping, your raw cost) into one honest number before GemScore even fires.
Defaults shown assume eBay sale at 13.25%. Customize fees, shipping, and channel in your account.
I've always been into statistics, financial markets, and derivatives. I've been grading through PSA for a while (got comfortable on the sports side first) and built GemEdge to bring that same background to the TCG grading side. Instead of bouncing between sites cross-referencing GemRate, sold comps, raw prices, and variations, always with that nagging feeling I was missing something, I put it all in one place with one easy-to-read GemScore. The more I build, the more exciting it gets. Still a work in progress. Not perfect, but honest. That's the whole pitch.
Real grades, real numbers.
Combined: $768.44 net across 3 cards · 3 sets · 3 channels
We score. You decide.
Every tool below surfaces one signal: profitability, gem rate, liquidity, spread. The data does the math. You make the call.
GemScore Analytics
One number that combines profitability, gem rate, liquidity, and spread quality. So you know exactly which cards are worth grading, and which to leave raw.
Scanner
Score thousands of cards in seconds. The strongest opportunities rise to the top. The rest get ruled out fast.
Optimizer
Plan submissions that earn back their grading fees. PSA tiers and shipping built in. Ship the math, not a hunch.
Market Pricing
Raw and full PSA grade pricing, sold comps, multi-period trends. The pricing research, done.
The product, not promises.
I score every card on profitability, gem rate, liquidity, and spread.
I subtract eBay's 13.25%. I subtract your grading fee. I subtract shipping.
I show you what actually lands in your bank.
I do the homework so you don't have to.
I show the math so you don't have to guess.
The call is yours.
Always shipping. Always honest about it.
Prices for every major grading company
Card pages in GemEdge price the full grade ladder, not just the PSA 10: PSA, BGS, CGC, TAG, SGC, and ACE each get their own tab, with per-grade prices wherever sale data exists. Raw, PSA 9, and PSA 10 stay front and center for grading decisions.
GemEdge now installs on iPhone and Android home screens
GemEdge installs to your phone's home screen directly from the browser, with no app store download, and opens full screen. iPhone and Android each get a short guided walkthrough built into the app, since the two platforms handle installation differently.
Every One Piece set now has measured gem rate data
GemEdge now carries measured PSA gem rate data for every One Piece set in the catalog, including six sets that previously had none. Gem rate is the share of graded submissions that come back a PSA 10, and it feeds directly into each card's GemScore.
Frequently asked.
Simple, transparent.
Early bird rates locked in forever for the first 50 subscribers.
Get the next drop.
Market shifts and platform updates when there's something worth saying.
Stop guessing. Start scoring.
No credit card. Free forever for the basics. Founding 50 pricing locked at $9.99/mo while spots last.
2026 GemEdge. Built for card graders, by card graders.
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