OK here is another one I always forget to mention...
- Return of Arcade Anniversary Edition (Microsoft)
And if you ever come across the Soundtrack to the FPS Outlaws by Lucasarts - it has some great value. It was offered as a promo when the game originally came out. Obviously the soundtrack is already accessible on the game cd's, but this was offered separately in its own jewel - so keep your eyes peeled for it. It is not plentiful but may get mixed with music cd's at a thrift, thrown into a boxed version of the game, etc...