Wait! What? Only 125 copies of this ridiculous promo game were created so you can expect this game will sell! Do you own one? Wrap it in cellophane, and expect to sell for over $1000 !!!

A bit of a video nasty, but definitely a game goodie! Consider a $200-$500 range, perhaps way more if you have the box, and it is in a clean condition.

This is the version of Mario where Donkey Kong is the villain and not the hero as later happens. If you have a new in-the-box cartridge, this is where the tru value lies - fetching as much as $800-$1000.

This one isn't solid gold, but it's a steady investment, fetching for between $100-$200+. Perhaps keep, if you own it already, and hold on for the long term gains.

A superb fantasty game that does well with , or without , the box. Considered a super early RPG maze crawler, anything in good condition is worth well over $100, all the way up to $700 or more if everything is intact. Keep a look out for Swordquest on your adventures!