Ok, I just sent Al some 7800 common carts so that he can make some new games. In the process of collecting these, I have the following spare, not so common carts: Basketbrawl & Impossible Mission. Both of these have been tested in my 7800 and the labels are ok...maybe 6 or 7 out of 10. If you want either of these PM me.
Impossible Mission $10
First class shipping anywhere in the USA is included in the above prices. They will be shipped in a bubble mailer and no, I didn't take any photos.