Extrem undercutting?

[Conradus]

Hello,
On my server, Zodiark, there seems to be someone who likes to ruin the auctionhouse market by undercutting on prisms extremely hard (e.g. from 13k to 9k) without a reason. What can i do to stop him? Doing what he does counts - in my point of view - as a form of harrassement - desturbing the playing experience of other players.

You can't. It's part of the market. You'll just have to deal with it.