Recentely, an old Nintendo system with 5 games was auctioned off on eBay for a grand total of a whopping $13,105. According to Wikipedia, 75% of the worth of the system was due to Stadium Games, packaged with the original box and manual which had been redesigned in later releases. The following games were included:

Mario/Duck Hunt
Mario 3
Turtles 2
MLB
Family Fitness Stadium Events

The following was the official description of the products from the auction page:

 

Up for auction is an original Nintendo NES gaming system with 1 hand control. There are 5 games with it. They are, Family & Fitness Stadium Events in the original box with the dust jacket inside of the box, Major League Baseball in the original box with the dust jacket inside of the box, Teenage Mutant Ninja Turtles 2 the arcade game in the original box with the dust jacket inside of the box, Super Mario 3 in the original box with the dust jacket inside of the box and the original game, Super Mario Bros/Duck Hunt. I have had this stored in the closet for years for my kids to play but the way that electronics come & go and change from one year to the next they wanted all of the new hot items of their own now and now it’s time to get rid of things that are no longer being used or wanted. This system worked perfect when i stored it but somehow over the years, we have managed to misplace the AC cord & the television hook up. I am listing this and selling without hook up but it I find them, i’ll send them along with the rest at no additional charges to you. Please keep in mind though that any ac cord will work with this and the hook up from a VCR would hook it up just as well as the original cords!

 

Source: Gossip Gamers