I think momentum has a lot to do with it (sellers go there because the buyers go there and visa-versa); but also Craigslist (while old-looking) is fast and easy

I think momentum has a lot to do with it (sellers go there because the buyers go there and visa-versa); but also Craigslist (while old-looking) is fast and easy for anybody to understand. For those of us who grew up with classifieds newspaper ads, CL does not feel hard to search with at all...it's no frills but does the job.