No one has responded to my listings on any of those four sites. Goodwill is starting to look like the best option.
I'm going to sell Rogue Squadron (PC), Tie Fighter Collector's Edition (the CD-ROM MS-DOS version), X-Wing vs. Tie Fighter (that's the one with the newer version of Tie Fighter and X-Wing), X-Wing Alliance (the first CD is broken, and it doesn't include the registry key), and Wing Commander II (most of these are bare CDs; I'm keeping the inserts and booklets from WCII--they're awesome); I bought all of those on sale from GoG. There's a few other ones I'm going to sell that aren't as old, and don't come with registry keys since they were lost long ago (there's ways around it though): Sega Smash Pack 2 (Steam has the first three Shining Force games on sale as of the time of this post, and I bought the entire Sonic Hits Collection on sale from Humble Bundle), Sonic 3D Blast, and Sonic & Knuckles Collection. There's probably some other ones, but they're in jewel cases and not a CD holder, and I don't feel like going through them right now. It's probably going to be another month or longer before I get around to listing them on eBay; I might post a separate thread when I'm ready.
The Long, Long History of TIE Fighter...Coming Soon!