In theory, you can still sell these.
The discs are cracked, but are the keys fine? If they are, then you can sell these with a notice saying "The discs are broken but the keys should work fine". People DO buy these, you know. And since you're selling the entire set and not just the keys, Macromedia / Adobe can't bitch and have your auction taken down. You just have to write down the whole "Discs are broken" thing repeatedly in the auction.