i think first hand shoppers could be treated better with some extra level or in-game extra that is delivered by on-line service. second hand shoppers would be buying cheaper but wouldn't have the same experience and extra a first hand buyer have. the pre-order bonus should be used to fight the second hand market instead of pre-orders, also instead of special editions focus on getting the first hand buyers happy!
Proudest Platinums - BF: Bad Company, Killzone 2 , Battlefield 3 and GTA4