I'm not sure what thread to check for on this one, but I have a lot of common and uncommon NES games - several hundred actually - many of which are doubles.  I've heard a great way to sell more common titles is to find ones that are used as donors for Repro carts

I recently sold about 20 copies of Golf for this purpose but was curious if there were others, or interested buyers?

the most in demand ones are snrom and tkrom IMO since there's only a few cheap games that use those.
basewars and shadowgate are the usual tkrom victims
preferably ultima exodus (but sometimes nes open tournament golf) are the snrom ones that are reasonably cheap.

Thanks for the infor I know I have an ultima and a shadowgate among these -- too bad top gun, rad racer, and to the earth aren't on the list lol

Top Gun and Silent Service work for California Raisins, Adventures of Dr Franken, and others. I especially like those if they are the Konami-made carts, indicated by the 24 on the back label, as they are easier to work with.

Hmmm I bet I have 20 top gun carts

I use donors man, but selling games just to use as donors is like burning books lol.

You can go to BootGod's site and see what type of cart a game is without opening it.

I would check out NESDump's old page using webarchive and you'll see what type of games are used for certain reproductions.

Gorilla

Yeah I hear ya man, but if the books are a million copies of Super Play Action Football then......