You could have a small fortune packed away in your attack and not know about it.
It turns out that old PlayStation and Nintendo games can reach a high price - with sealed copies sometimes worth millions, reports the Express..
Last month the most expensive video game ever sold went under the hammer for a whopping $2million.
That was an unopened copy of Super Mario Bros for the NES, released back in 1985. This came after sealed copies of Super Mario 64 and The Legend of Zelda sold for $1.5m and $870,000. respectively.
The surging prices mean a gaming bargain you picked up years ago at a car boot sale could now be worth hundreds of pounds or more. However, you need to bear in mind that not all retro gaming items will be valuable as others.
The Nintendo games that have set record-breaking prices recently were all unopened and in immaculate condition.
The copy of the US version of Super Mario 64 that sold for $1.5m had a score of 9.8 out of 10, awarded by game-grading service Wata Games. That means the game - released in the 90s - was in virtually new condition.
Roberto Dillon, the founder and curator of Singapore's James Cook University Museum of Video and Computer Games, told CNN the 'holy grails' are unopened, early editions of iconic games that are still in its original packaging.
Dillon explained: "If you open it, the value of the game halves".
Even if you missed the boat on picking up retro games decades ago, the good news is - with gaming moving more and more into digital sales - physical editions currently on sale could become rarer and rarer.
Dillon predicts that limited-editions of physical games could become the next big thing.
He said: "Twenty years from now, today's kids will have disposable income and they (will) want to recreate a collection of games from when they were young ... they look for the collector's editions that were launched back in the day, but they didn't own."
While unopened games in pristine condition are fetching the highest amount at auction, you may be surprised at the prices of some of the old games and consoles you may have lying around your house.
Especially if these items are in good condition and have the original boxes and manual.
If you find any retro gaming items lying around and are wondering how much it's worth then head to pricecharting.com.
There you can find out the value of different gaming items and how much its value has changed over time.
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