I hate to make a legit answer to a Casemods post, but some collectors do actually value those boxes you still have, there is a good chance if those boxes have the little books that came with them, they are worth more then the cartridges themselves, particularly Startropics, Batman, Kirby and Mario 2. But selling as a collection all at once, you wouldn’t get as much as if you sought out collectors to sell to, a peice at a time, and asking a non-video game oriented website where you already have a reputation for being… ‘thrifty’ and aquiring your items via dubious means, is probably not the best way to go about it.