If I am buying something used, I am looking to get a bargain to make up for the risk of buying a used item. I'll probably not even respond if it is priced close to what a new one goes for. If the item is priced at the low end of what I consider to be reasonable (or is a steal of a deal), I won't usually haggle. Bought a GT Vantara hybrid in very nice condition for $40 recently, no point in haggling over that sort of price.