I am selling my entire collection, including more than 700 unique cartridges (no doubles!) and a few systems, on eBay near the end of this month (September 2009). I have put a preview video on YouTube to show off what's available. Take a quick look:

http://www.youtube.com/watch?v=aLv59LRsAFg

Also, I have a few pages describing the collection, and dozens of pictures here:

http://www.hentschels.com/wiki/index.php/Nintendo_Auction

Stay tuned for more information in the next few weeks.