If Ebay is to survive intact, it's probably it's only option. It probably holds world records involving litigation, scammers have found ways to manipulate every facet of it's services, they cannot introduce a verification system that ensures member safety, unless they go the way of Amazon.
This will leave Gumtree or something else they develop, to take care of the Mum & Dad market. You could try OZtion, but if you enjoy forums, you probably won't survive unless you go in a group and boot out the Gang that controls it.
That may prove difficult because they have Admin support, so that only leaves buying and selling.
Sellers are always whining on the forums they have no sales, and the biggest selling items are under $10, mostly clothes, and judging by the behaviour of some of them on the forums, I have no doubt their stock comes from charity bins at 2.00am in the morning. This rationalisation, had to come, nothing lasts forever, scammers make sure of that.