That is REALLY cheap that is the only thing that I would be worried about. Is it at a BMW stealer or an Independent dealer. Not much really to worry about they are pretty strong cars and take mods quite well. Most people look for Vaders which are seats as highly regarded option. If it is a indenpdent dealer ask them to have BMW certify it it will cost you like $350 but worth it for piece of mind if you are having to travel to get the car. Also, look on BIMMERFORUMS.COM or DTMPOWER.NET. If you have any other questions I have done some extensive research and might be able to help you just PM me.