I don't think anyone replying to you understands how much the selling experience varies by what you're selling. If you're selling used tires or consumer electronics you are gonna wind up dealing with idiots 24/7 no matter which platform you choose because everyone is a potential buyer for those things.

If you're selling things that are only of use to a few people cost more than a grand, weigh more than a couple tons and don't move on their own you'll generally only deal with people who are serious about buying.