Is Your Old Game Collection Worth a Fortune?
Somewhere in a loft, a garage, or a charity shop box, there are games worth serious money. Not theoretical money. Not “collectibles might go up one day” money. Right now, auction-verified, somebody-paid-this money.
A sealed copy of Super Mario Bros for the NES sold for $2 million in 2021. A sealed copy of Super Mario 64 went for $1.56 million two days earlier. A sealed GoldenEye 007 — the same N64 game you can now play for free on Switch Online — sold for $192,000. These aren’t outliers. They’re part of a collecting market that has quietly turned childhood toys into financial assets.
But here’s the part that actually matters to most people: the same cartridge, bought loose at a car boot for £2, might be worth almost nothing. Or it might be worth thousands. Knowing the difference is the interesting bit.
It’s Not Just About Rarity
The assumption most people make is that rare games are valuable games. That’s partly true, but condition is often a bigger factor than scarcity. A graded, factory-sealed copy of a common game can be worth exponentially more than a rare game played and worn.
The grading system that drives the auction market is run by a company called Wata. They assess games on a numerical scale (the condition of the cartridge or disc) and a letter grade (the condition of the seal). A Wata 9.8 A++ is essentially perfect — factory sealed, pristine, untouched. And that rating can be the difference between a game worth £10 and a game worth £10,000.
The same copy of Contra sold for $150,000 in graded condition. A complete, ungraded copy of the same game sells for around $250. That gap — driven entirely by a piece of unbroken plastic shrink wrap — tells you everything about what this market values.
Some of the Numbers
To give a sense of the range — these are all verified auction sales:
- Super Mario Bros (NES, 1985) — $2 million sealed. Loose cartridges sell for a few pounds.
- The Legend of Zelda (NES, 1987) — $870,000 for an early production sealed copy. A played copy is worth around £20.
- Super Mario 64 (N64, 1996) — $1.56 million sealed. A loose cartridge goes for around £15.
- Sonic the Hedgehog (Mega Drive, 1991) — $420,000 in graded condition. One of the most common Mega Drive games you can find.
- Tetris (Mega Drive) — up to £18,000, and only around 10 copies are thought to exist. Tetris was never officially released on the Mega Drive due to a copyright dispute with Sony — but not before a small number of cartridges were produced. If one surfaces, it’s genuinely rare.
- GoldenEye 007 (N64, 1997) — $192,000 sealed in 2021. A loose N64 cartridge is worth about £30.
What Actually Makes a Game Valuable?
A few factors combine to push prices into serious territory:
Sealed condition. The single biggest driver. Once opened, a game loses most of its auction value instantly. Games that have sat undisturbed in a box for 30 years, still in their original shrink wrap, are what the top end of the market chases.
Production variant. Early production runs often have slightly different box art, label printing, or seals compared to later runs. The $870,000 copy of Zelda was an early “No Rev-A” variant — visually almost identical to other copies, but from a production run that only lasted a few months in 1987.
Platform exclusivity. Games that only appeared on one region’s market, or were recalled shortly after release, tend to be scarcer than their gameplay warrants. Tetris on the Mega Drive is worth thousands not because it’s a great game, but because almost none of them exist.
Cultural weight. Mario, Zelda, Sonic — the games with the strongest nostalgic pull attract the most bidders at auction. A mint copy of a beloved classic will always outperform a mint copy of an obscure title, even if the obscure title is genuinely rarer.
How to Check What Yours Is Worth
The best free tool available is PriceCharting.com. It tracks actual completed eBay sales across thousands of games and consoles, updated in real time. Search your game, select your console, and you’ll see what loose copies, complete-in-box copies, and graded copies have actually sold for — not what sellers are asking, but what buyers paid.
For anything that looks potentially valuable in sealed condition, professional grading through Wata is worth considering before selling. A graded and authenticated sealed game will consistently outperform an ungraded one, even if the condition appears identical.
And if you find something at a car boot that looks sealed, complete, or genuinely old — it’s always worth two minutes on PriceCharting before you walk past it.
Interested in collecting retro games for playing rather than investing? Our Best Retro Console Games to Play in 2026 guide covers the titles worth your time and where to find them.