any retainer selling 15 stacks should be suspended right away , it takes me a ages to get 1 stack, probly a day if not more, if only because i aint the only one farming.. u can be pretty sure noone will farm 2 weeks to get 15 stacks of them.
This is a clear sign of botting unless he can prove that everyone in his LS donated tons of fleece to him wich i ofc doubt