That's. . . not what I said at all. Okay, say I think Buccaneer's Shirt is worth 10 million gil, because, hey, it's an awesome shirt. Problem is, everyone else thinks it's only worth 5 million. Do you think anyone's ever going to pay my 10 million asking price when there are other ones available for half the price? Conversely, if I only think it's worth 500k gil, but the majority of buyers would be willing to pay 5 million gil, I've just shot myself in the foot.

It has nothing to do with what I think the item is worth, and everything to do with what the buyers will pay for it.
ok is it worth 10 million gil because of the time and erffort you put in to get it or because of the prices of the mats you need to make it or is it because you just pick a number at random? the price of an item has nothing to do with ppl a willing to pay because is someone needs it bad enough they would 40 million for the shirt if it's all they can find so yeah some could pay your 10 million asking price. and if i cost you less than 500k to get/make it you didnt lose anything so not really a shot in the foot.