Originally posted by: dangevinMine's an excel sheet that has NintendoAGE rarity information, as well as loose-cartridge prices for the past three months as compiled from eBay.
http://www.nintendoage.com/?go=dangevin
There are also multiple free ones around the net, some of which have a TON of info about foreign and other strange games, like NationalGameDepot's list.
I would suggest you buy one of these! The list is awesome and helped me get my shit together. Since I bought that list I have added 150 games towards a complete NES set.
The list is awesome. I have recently picked up a Palm cell phone and carry my NES list everywhere I go.