I like my buddys system he uses when he sells things. He decides what he wants to sell an item for and lists it for that price. A tire kicker offers less than his asking price.,he politely declines the offer. He tells them his asking price is the selling price. If they make another offer less than what he is asking he counters with a price $50 more than what he originally asked.
Some get angry but most others get it and either pay the asking price or move on.