I’ve had more luck on Facebook recently. There doesn’t seem to be a pattern to it, it’s all down to luck, selling the right thing at the right time.
I’ve had very little interest on here for my W&T bass. One guy had me take it all the way to London with me, take a trip up to Camden, wait around for an hour while he played it. He then announced that he wasn’t sure because it was a 33” scale and had humbuckers, both of with are clearly mentioned on the advert, he’d also owned a very similar model previously. He said he’d think about it and get back to me, he hasn’t though.
My experience of selling through Facebook has been great. Gumtree not so, you do have to watch what you’re doing there. Never post something, never accept PayPal, always insist on cash on collection.