Oh I think the order is important

1) Summon retainer to the market ward
2) Add item to retainer's inventory (Exchange Items)
3) Manage Bazzar on retainer and add the item to the list of items the retainer can sell, and set the price
4) Close the menus. The retainer should still be standing next to you.
5) Leave the wards, then check item counter. It should appear within a short period of time (minutes or so?)

Note: If you summon a retainer AFTER you set items in its bazzar it will remove them from the bazzar (I think.. I remember seeing a message that says this will happen).


If you need to manage your retainer some more, go visit him in the ward that you set him up in, and deal with him there directly.