I don't worry too much about cosmetic items like that....as a former detailer, I never met a stain I couldn't wrangle out. What I do worry about are the things I can't see. For instance, how many times did the owner, or owner's 16 year old kid rev the engine to 5000 and drop it into drive? How many curbs were run over while pulling into the gas station? How many of the body panels / suspension parts are original to the car? How many times, and by how much were the OCIs ignored, postponed or forgotten? These are just some of the things lease cars (and rental cars) are subject to, which is why I prefer to meet and speak with the former owner on a private purchase. I'm pretty good at quick assessment of a vehicle, and love to catch people in a lie. It's pretty clear to me that if the dipstick is covered in varnish, or worse...sludge, maintenance wasn't first and formost on their minds. If a lie is discovered, I'm gone, as there's no telling what else he / she may be lying about.