I think it'd be really cool if Vehicle Dealership's owner would be able to just select the margin (cash on top of import costs) he wants to earn on cars and players would be able to import cars from the menu on their own. At the moment car purchasing is problematic because the owner of the shop has to be online to check the price of car you're interested in and has to import the car for you.
Also, I think this way, players would purchase many different vehicles and be able to check prices of cars (to know how much they need to work) on their own, without annoying the Dealership's owner.