Sadly no, this probably won't drop... most likley at all!
Look at games like Mario Party 6 and 7, Tennis and Baseball! ALL have been out for quite sometime..and they are ALL still $50.
It took Mario Kart Double Dash like 2, 2 1/2 years to go from $50 to $30
I even see Mario Party 5.. USED copies for about $30..
Grrrr..