Joshua 
2007 BMW 3 Series Convertible 335i 2dr Convertible (3.0L 6cyl Turbo 6M)
Dinan Tuned 335i Convertible.
 I love my Dinan Tuned twin turbo convertible! I am the 2nd owner and bought a BMW that was maintained very well under extended warranty by the first owner. If you research the N54 engine ('07-'10 335i models) - you'd learn that certain expensive components on most of these BMW's fail by 80k miles, so if you buy a 335i that hasn't had these faulty parts replaced, you'll spend thousands of $$ to replace each item. That includes a fuel pump, fuel injectors, water pump and twin turbos. I flew in one way to LA to pick up my BMW after evaluating Carfax report and service records that the previous owner provided and verifying that BMW dealership replaced all important parts including HPFP, all fuel injectors, both turbos, water pump, thermostat, oil filter housing gasket, oil pan gasket, intake manifold gasket, oil cooler gasket, spark plugs, front control arm bushings, front tie rod assembly and other misc. items under the extended warranty (~$18,000) and there haven't been any problems for the last 25K miles. As other owners of BMW's say - either buy a well maintained 335i that had the issues above addressed (with verifiable service records) or get an extended warranty - otherwise you will spend $5-7K a year to maintain this beautiful and fun ultimate driving machine. I highly recommend you request a Carfax report and verify service records before buying your BMW, and if the seller cannot afford to spend $30 on Carfax report and has no maintenance records - you are probably buying a money pit. Don't buy salvage BMW's either - most have odometer rolled back and are in poor mechanical shape. Good luck!