So I've been thinking about it and I think I'm gonna sell my car (in the near future) and buy an E30 M3. I know a little about these cars but wanted to hear what you all have to say about them... -average costs? -what goes wrong with them? -easy to work on? -parts costs? -usual mods to look for? I've always liked these cars and have had them on my list of cars to own for quite awhile now. Any information would be helpful. Thanks!