[cummins]

I bought my 2011 335d M Sport in 2014 for $30k. These cars are not going over $20k now.
Has the seller done anything aftermarket like fixing the carbon buildup issue? or has it been recently cleaned?

If this car is stock, I'd probably hardball this at 15-17k. Unless it's been cleaned. Otherwise you're looking at $3k to clean.

Mine
had 30k miles
iDrive
HK
NAV
cold weather
rear seat sunscreens

Now has 55k miles. New intake, carbon cleaning, Stage 2 tune, alphabet delete, iaknown exhaust. Swirl flap delete, 42mpg. needs airbag.