The number of auctions in the early 2000s was staggering! Furniture and art were the two cheapest items to buy...
(I'm guessing here that Craigslist and Facebook will survive.)
Craigslist over the past 2 years has had zero issues, I've interacted with fairly even keel 40+ year old people that are easy to work with. The "no lowballers, I know what I got" crowd has mostly departed Craigslist.