Unfortunately this is why nobody ever advertises the pin they are selling for the price they want (that's why it is always nice to buy from a friend), everybody wants a discount, and will always ask you what is the best price you will sell it to them for. So people usually jack the asking price up, so when the buyer asks for a discount, the seller knocks a little off to what they really wanted in the first place and buyer thinks he just negotiated the deal of a lifetime. It's sad, because it would be nice to just say this is the price I want without all the haggling but most people like to haggle. I will say if the person is a real pain in the butt (I have ran into this quite a few times selling old car parts, you give them a deal on multiple stuff and they ignore the price you say and keep repeating a cheaper price) then I just say a higher price then what I advertised it for. Some people take a few mins. before they realize what you just did, and then look confused, But I never take offense, remember you can always say thank you for your interest and have a nice day.