In terms of convenience, even Tanaka, back in November, had mentioned a delivery system to be implemented in the first patch of 2011.

Further adjustments to retainers
An increase in retainer inventory capacity
An increase in the number of items that can be placed in a retainer's bazaar
A fix assuring that retainers do not leave their bazaar locations after server maintenance
The addition of a sale/purchase history
Functionality changes to the "buying" feature
The addition of a delivery service
Bolding added by me for emphasis. Some sort of delivery system makes sense. The details .... I don't know.