Gamestop is offering a deal which allows you to purchase a PlayStation handheld for less than its retail price of $249 and $299 - 3G version. This offer will begin trading-in on February 22nd.
Bring four games that worth $8 or more on Xbox 360, PS3, Wii, 3DS, DS or PSP to Gamestop and each game will be giving a credit (up to $25). You can call your local Gamestop to see which games will qualify for this offer.
However, there is also running a promotion where any console trade in Xbox 360, PS3, PSP 3000, PSP GP, Wii, DS Lite, DSi, DSi XL, and 3DS and receive a credit up to $50. It is not a bad idea to trade in your old PSP towards the purchase of a PlayStation Vita on February.
Source
Bring four games that worth $8 or more on Xbox 360, PS3, Wii, 3DS, DS or PSP to Gamestop and each game will be giving a credit (up to $25). You can call your local Gamestop to see which games will qualify for this offer.
However, there is also running a promotion where any console trade in Xbox 360, PS3, PSP 3000, PSP GP, Wii, DS Lite, DSi, DSi XL, and 3DS and receive a credit up to $50. It is not a bad idea to trade in your old PSP towards the purchase of a PlayStation Vita on February.
Source