If a Retainer has sold all the items in his/her bazaar, then remove that retainer from the ward.

They're not doing anything useful and taking up space. The player's owner can simply call them back to manage his/her items. This would help alleviate the issue of occupancy limits and such, at least in the short term. It also gives the player a way to check on his bazaar by seeing if the retainer's location has been reset. I should think that it's a simple fix.

And I swear to the Godless Garlean Empire, if someone here replies, "better yet, just give us an AH," I will come to your house give you an auction you won't likely forget.