Nintendo World Championship Carts zijn de heilige graal voor enkel serieuze game collector, want er zijn van deze cartidges slechts 116 gemaakt voor de Nintendo World Championships die in 1990 werden gehouden. Daarom zijn deze ook extreem duur, zelfs als ze in hele slechte staat zijn. Want de kaart die nu op eBay staat heeft een verscheurd label en daarom staat de prijs nu op "slechts" $7,1000 en zal tegen de sluiting van de veiling waarschijnlijk tien vijftien duizend dollar opleveren.

An extremely rare Nintendo game is expected to fetch thousands of dollars in an eBay auction.

Only 116 copies of Nintendo World Championships were ever made, as part of a special event in 1990.

The first bid came in at $4,999 (£3,000), but the game is likely to fetch more, one Nintendo expert said.

Unfortunately for collectors, the cartridge is in poor condition - with a ripped label and "Mario" written on it in ballpoint pen.

"This is quite unfortunate but happened many decades ago," explained the seller in his description of the "super-rare" item, adding that whoever wrote on the label did not have "a clue what they actually had".

Created for the Nintendo Entertainment System - better known as NES - Nintendo World Championships was designed for a competition, and never went on general sale.

The game features shortened versions of three classics - Super Mario, Tetris and Rad Racer.

Competition entrants were given six minutes to amass points on the games, with whoever came top winning a trophy, a trip to Universal Studios and various other prizes.