I agree with The Monkey. I'd emphasize that it is annoying, and that's why I hate selling stuff anywhere except here, but it's just part of the deal when you sell stuff. The buyer just figures you can say 'No', plus should you decide to come down in price later, maybe now he/she is first line. But again, I would say that I get annoyed at significantly lower offers, whether it's considered low balling or not.