found a great price-- never owned a bmw before so want to know how expensive it would be to fix if something goes wrong. Car has 90k miles. THoughts?

 

Only obstacle would be Alternator & Battery. Other than that suspension pieces are cheap, brakes are cheap, rims, tires, oil, filters even trans flush and pan can be done for pennies on the dollar. As long as fluids are flushed at intervals should be good to go

These forums have huge DIY section for most major items. But personally I would rather get a high mileage E39

 

i bought my 04 530i with 97k and havent had anything major (knock on wood) however I have had my fair share of little things that add up... passenger restrain malfunction, oil leaks, etc.
Good luck and welcome

 

have several CC. Oil pan gasket 1200$ just as an example, 02 sensor. Lol 200. Yep it's a blast I got just a couple more miles than u at 84k my mechatronic unit went, that sucked, then coolant, then valve cover gasket, 80-100k is where you fix it with the best parts and it will last. Def do tranny.