I was days away from handing over cash for a 428i I found online when a colleague at work asked if I'd had it inspected and I realised I hadn't even thought about it. The seller seemed decent and the car drove fine on the test drive but I know nothing about reading fault codes or spotting a tired turbo, so I started looking around and ended up on https://bmw-garage.ae/pre-purchase-inspection/ after someone in a group chat mentioned it. Long story short, the inspection flagged a couple of things the seller hadn't mentioned, nothing catastrophic but enough to knock the price down or walk away, and I ended up walking. Gutted at the time but honestly relieved now. If you're buying used, don't skip this step, the couple of hundred dirhams saved me from a much bigger headache down the road.