Just came up with something else that MAY stop gil sellers, and buyers.

Currently they all use moogle mail to do their trade, how about only allowing ONE mail that is valued under 1M gils to go thru per day, and any additional mails/larger amounts needs to wait for clearing house approval - Turn around time? 3 days, like a bank clearing house.

Case:
1: Player A trades with player B for set of iL90 weapons, 10M gils. Both are legit players, transaction is on hold for clearing, 3 days later, transaction goes thru.
2. Player A trades with player B (B = gil seller), 1M gils goes thru from B to A, rest pending for clearing. SE catches the HUGE transaction from B to many other players, ALL transaction from B removed from game, and gil confiscated. All players involved are banned from game.

This allows SE time to police ALL gil related transactions in game, and a place for them to screen for gil sellers.

jc