That would be a legitimate grievance with 1.0 that should have been dealt with, I can only assume they didn't because the market wards themselves were a catastrophically shit concept to begin with (allowing more retainers in the wards didn't solve anything, nor did connecting the 3 wards in a way that was not at all convenient of effective).
No one cares about your pretty stall, no one cares about what your retainer looks like, no one likes having to run back and forth from their retainer to the edge of the zone to check prices.
Lack of an AH is one of the big "if it ain't broke, let's break it for shits and giggles" things from XI, I can only assume the system was designed around retainers so much that to implement a working AH in 1.0 would have been considered too much trouble.
XI Wiki


