I would always mark up my prices for things on forums a little bit so I had room to haggle it down but I never entertained people asking what my lowest price was. If you can't afford sticker price, you can afford to haggle. It was a pretty niche marketplace so there was pretty much never going to be anything like those crazy thrift store finds where someone buys something worth $5000 for $5, all the sellers usually had a good idea what their stuff was worth and priced appropriately. There were always the morons who priced their junk 5x it's market value but those people were too stupid to haggle with, they would get insulted when you offered a good market price.
When I don't want to haggle (which is often, as I hate it) I simply take the posted price and pay that or ignore the offer. I will never ask for a cheaper price if not interested in haggling. People with deliberately overblown prices which never expect anyone to actually pay that will simply not get my business at all in that case.
