GameStop's seasonal special, the Summer Playcation, is live now and offers double in-store credit for any system trade-in, and 30 percent extra in-store credit on games, smartphones, accessories, tablets or media players. These deals run through August 18, as does an existing deal that nets the customer any new game for $10 or less with the trade-in of two eligible games.
Keep in mind this is not the Summer Placation, where we imagine GameStop would insult your mom and then offer up all games and systems for free, along with some kind words* about your heritage.