Private sellers can operate however the hell they want. Even if they are doing it as a business of sorts, they don't have the same kinds of overhead that a brick & mortar traditional retailer has. If they're doing it as a hobby, or just listing whatever stuff they have, they can use whatever rules they want. Doesn't mean buyers have to buy their stuff, but they can sell it however they want.I couldn't pass this up... I know it's a bit off topic, but there were recently several days worth of discussion where it seems this logic didn't apply. Strange to see it being applied here.
A traditional brick & mortar shop that does too much of this is going to find themselves with a cash flow problem eventually. They'll be paying inventory tax every year on crap that doesn't sell. Stuff that doesn't sell occupies space that could be used on things that do, and which pay the bills. Joe Blow selling on Facebook marketplace or craigslist doesn't have those same problems.