I know this is the place for E34, but it's a more active forum and some of you own 3 series cars also, so...

I'm thinking of buying this car. Can you please tell me what are the known problems I should look for? Also, is it a good car (general opinion)? How about performance(speed,acceleration), consumption, maintainance costs, resistance to rust,...? The car has huge 18" wheels ... they look awesome but do they have a bad impact on performance or fuel consumption?

Any thoughts would be appreciated, thank you very much.