You should be able to find a new copy of the GOTY edition for under $10 on ebay. Well worth it for what is in my opinion the best FPS ever made.

As for other funny moments, in FS2 yesterday, I had a Serapis docked with an Argo and fired some morning star shots at the fighter, which caused it to get knocked around as usual, but the Argo moved along with it.

The game was apparently only considering the fighter's mass for the entire thing and it looked quite ridiculous. This has been around since retail FS2 but is basically a bug, so I'll put it on Mantis when it comes back up.