Then stay away
We dont need an AH, and the current Market Wards are a bit unstable but remember this game is in heavy development. This is a BETA people, not a finished product so don't expect it as such. I much prefer a decentralized system. It allows for a more dynamic economy. For example, in some regions mats are more easily obtained therefore they would (theoretically) cost less in areas where they are in abundance and more in areas they are not. This does not work right now because of teleportation, but once that is gone it will.
When the Ala Mhigo zone is released there will be mats attained from there that cannot be found in Gridania so they have to be taken there. See a more dynamic system. Not a magical AH where everything is linked together....and yes I know in XI they were not all linked.