Gold Sellers

[QT_Melon]

There's a solution to that too, albeit more complicated.

The game could run a bell-curve for price distribution, not allowing an item to be priced 20% below the current best price and a floor of the NPC price, nor priced 20% above the average selling price. Anything more than 20% over the current best price is flagged as potential RMT. Any items that are not crafted by the player would be denied from listing at anything more than 20% over the average selling price unless there are less than 10 of the items on the market.

The problem with that is due to the limited inventory space players do actually put up items they intend to keep but at an inflated cost. That's why you see those listings for 999999999 gil I wouldn't want them banned for RMT.