How intelligent are these bots? Could you hypothetically set an item for 2gil (assuming it's something that you don't mind accidentally selling 1 for 1gil) and watch the bot try to sell all their stuff for 1gil? Buy them up and then put yours and their's up for a more reasonable price? Make them lose money and profit from it at the same time.

But that thought obviously weighs on how intelligent the bots can be.