I remember 'Elite' I first played that on my now extremely ancient (and also dead) Amstrad 464.
As noted by Raven, this was probably the first 'space' game that had it all, trading, fighting and just plain old flying around shooting stuff.
Good story line too from memory.
My Fav games?
TIE Fighter (want to know where you can get access to a *huge* database of add on missions? contact me!)
Need For Speed: Porsche 2000 (EA broke the mold when they made this game!)
Carmageddon
Guild Wars (game 1 & 2 rox, game 3...eh)
and last but not least
Freelancer.