I think a lending system would be easily implemented. Set it up as a button u click on the trade window to make it a lending trade the item is then traded to buyer. The item is marked as a loan item that is not tradable to other avs or tt able or dropable and will automatically return to the sellers inventory after a set amount of time or a set amount of decay applied to the item . it would be very easy to do then of course their would be the problem of people clicking on the lend button without the buyer knowing.making the buyer pay full price with the assumption the item was now theirs when really its set to return to the seller in set time or set decay. so it would be easy enough for
MA to set up but it would also cause a whole new host of problems and complaints when it comes to player to player trading. so its more hassle then they want to deal with.