Its because they estimated demand perfectly.
The only time games drop in price is when they have published a lot more than there is demand for, and so pass on discounts to retailers to cut the price. Even if they make little money, they still need to get rid of the stock in a more efficient manner than just throwing it away.
For some reason though, most publishers are pessimistic with handheld games compared to home consoles and the supply impacts the price of the games. On vita for example, AC liberation vita costs more than AC IV PS3 new, and black ops declassified (even pre-owned) costs more than COD ghosts PS3 new.... this is despite the handheld versions being OLDER. The handheld versions are certainly not better games as some people above have suggested as being a reason. Theres just not enough copies going around (compared to demand) for the price to come down.







