What I do with US Audiomart is look at it, a lot, like, way too much. Selling there hadn't even occurred to me. Do you list stuff as specifically local pick up only or does it just work out that way sometimes?
I listed some CD racks and a Bryston Amp I did not have a box for as local only and they both sold. Couple of other things I was willing to ship and they sold locally. That search by ZIP feature can be nice or nice and expensive.