I'm looking at a 2017 330i from a private seller and the price is tempting, but the car has no service history and the seller seems a bit evasive about previous repairs. I want to get a proper pre purchase inspection done, but I'm torn between a general mechanic and paying more for a specialist. Would an Abu Dhabi Authorized BMW Workshop be overkill for this, or is it worth the extra money to check things like timing chain health and valvetronic system? I'm worried that a normal garage might miss expensive issues that only someone with dealer level diagnostic tools would catch. Has anyone here bought a used BMW without a specialist inspection and regretted it later? Really don't want to end up with a money pit.