To the OP, no, No, NO, NOOOOOOOOOO, a THOUSAND TIMES NO. Listing fees were a bitch in FFXI and I shouldn't be punished because others are too stupid to sell things at a profit.

You know what I think it is, my friend had this problem and since this game is 95% noobs then they probably are making the same mistake, he didn't even know that selling things to an NPC was even an option. He just thought that the marketboards were the only option. That would explain all these idiots that sell things for the lower or the same price as the NPC. In fact, most try to make a "profit" by increasing the price by 1 gil more than the default price, but they never consider the % you lose when you sell something. So those making 1 gil off your cheap items, if it reaches 20 gil in price, then your 1 gil profit is lost to selling fees. It's common sense people, just your brains, THINK. lol, telling people to think, that's like telling a dog to fly, it just isn't going to happen. lol