I wonder how they will protect against scumbag sellers. It seems that there is already a lot of value to just filtering the potential buyers. How can they prote

I wonder how they will protect against scumbag sellers. It seems that there is already a lot of value to just filtering the potential buyers. How can they protect themselves from a seller being there when the potential buyer shows-up and then working out a sale on the side? Anyway I've taken advantage of some of the crazy but cool trades that happen from selling used cars so I'm not really a customer.