Please implement a listing fee!

[Ildur]

If we assume a market with 40 providers, and that the first providers puts his item to sell for 5000 gil, then the other 39 providers will have exactly one free opportunity of undercutting each other.
Without a listing fee, the other 39 providers have infinite opportunities to undercut each other, reagardless of wealth.

So as Synaesthetic is saying, a listing fee is better than no listing fee. Initial undercutting is happening now anyway (and I'd argue that it will always happen). Both systems have that disadvantage and, thus, you can't use it as an argument against either. It would be like comparing which one is better to transport goods, cars or trucks, and conclude that the good answer is "cars" because trucks can have their tires broken if you shoot them.