It's preference really. Private sales don't come with any warranty. That's kind of the risk we take on getting a good deal or finding something we can't find anywhere else. That being said, unless you call it out, covering stuff up in hopes the buyer won't see it is not cool. Had it happen to me. You can tell people to inspect inspect inspect but in my case I'm not going to pull an AK out from a trunk in a crowded parking lot at Best Buy in Marietta LOL
Why not I do and don’t have a problem doing it!!! F these whinny ass people!! My first ever deal was done less than 30ft from a Cobb county police officer in a Lowe’s parking lot with @cocoa just dropped the tail gate down and let it rip tater chip!!!