Theres some peeps selling many stacks of 1k crystals on my server too, 30 to 35k a stack. I spent a couple of hours and gathered up 1k, put 2 stacks of 500 up for 15k each and it sold within a few minutes. Watching the freeking bots teleport around right in front of my face burns my hyde like I don't know what but hey, it didn't stop me from making gil. All we can do is report them and from what I've heard if you report them at least twice theres a good chance it will be dealt with. One thing I do is to not buy anything from people selling more than 5 stacks of anything, I'll pay a little more if I see one person selling one stack of an odd number of stuff cause I know it's a player. /shrug