Sounds intreresting, but I have the wing 4 demo disc which has a preview movie on it. And my guess would be that it's the same movie. I have it burned onto CD, so why pay five bucks for something that I may already have 50 copies of?
Speaking of cool stuff on ebay, I found an original copy of wing 4 for 3 bucks yesterday at electronic discount sales. And I found a copy of WC1 Deluxe in it's original box, and I found Wing Commander academy, which I bought.