As much as another voice in this chorus isn't needed - I feel I must reply, if for no other reason perhaps to bring some well needed self analysis by the OP. I read a few of the other threads people linked to and there is indeed a common variable in all of them. A lowball seller who does not understand first in hand with money at fair price gets the goods.

OP - I genuinely do not mean to be rude, but the issue is 100% you.

There is absolutely nothing wrong with trying to haggle and get a good deal, but do not be shocked if the item moves to someone else at a higher price. Sellers have zero obligation to then contact you and play ping pong between interested parties to jack up the price. That in my mind is a bad seller. Good luck in you future purchases.