Got an old NES entertainment system just lying around at home, a few of you should as 96.91 Million units where sold since 1983. (still sold until 1995 in U.S and 2003 in Japan)
If you do might be the time to drag it out of the garage from under the bags of junk that are piled on top of it and give it a dust off, depending on the game you have store with it, you maybe on a gold mine.
A recent ebay sale that contain the game “Stadium Events* sold for $13,105.00Usd yet that’s right $13,000 dollars!!!!, this price was mostly down to the game *stadium events* which according to Nintendo Age is mainly sort after for the box and manual.
NES sells for $13,105usd
The www.racketboy.com website also lists some other rare games estimating price around the $10,000
1. 1990 Nintendo World Championships (NES) ~$10,000
2. Kizuna Encounter (Neo Geo) ~$10,000
3. 1990 Nintendo World Championships: Tournament Cartridge (NES) ~$4000
Funnily enough *Stadium Event is only listed at #6 with an estimated Price of $1000. Some of these games though are extremely rare with #1 Nintendo world championship only having 26 copies produced, but hey maybe you have copy #24.
I have been in IT for over 10years, working in tech support, customer service, network administration, hardware. Currently working as Database Analyst for a Large Telco. Fan of all things techy and geeky. 
thats crazy. im suprised those things still work.
This is tech-geek stuff!!! (I love it)