The current style auction house is pretty bad, bring back the FFXI style where we can only see the history. This will help stop people from undercutting as much as they currently are.

In a day you can see prices on certain items go from 3k per to 1k per due to people taking down items and re-listing them.

Also I think the tax we pay on an item should be charged upfront not when the item sells, this will also stop undercutting a bit.