I do check those. also check your local scrapyards and auction houses. usually they'll list anything that'd been registered (in many states by law) so you can see if theres any neat scooters and stuff. some, especially depending on state, wont list or even auction scooters or mopeds and we've scored some good deals that way - just show up and ask about em, make an offer
I remember being nervous to share the shopgoodwill back when I was snagging great deals on motoparts from there, gear and stuff. for a while I was just reselling Harley shit from them on ebay and local craigslist and making 2-3x. vintage skateboard and videogame stuff too. now folks have caught on but theres still cool deals