As the U.S. economy continues to struggle, GameStop has been able to build up its used game inventory.

People are taking advantage of cash-for-games and trade-in programs at GameStop locations, according to COO Dan DeMatteo.

"Because of the economic condition, we did not have to be as promotional on the buy side of games, because it just seems like we were naturally getting consumers trading [games in]," he said Thursday. "That's why our margins are slightly better than they were in the second quarter last year."

But he doesn't think his company will be sitting on that used inventory for very long. DeMatteo said that he feels "very good" about GameStop's used inventory levels. GameStop expects "very strong" sales in the third and fourth quarter due to the high level of inventory.

"[Used inventory is] much higher than it was at this time last year ... We always say we can't have used inventory too high going into the back half of the year," DeMatteo stated.

Used game sales grew 32 percent year-on-year for GameStop, accounting for 26 percent of overall sales during the company's fiscal Q2, which generated $1.8 billion (£960 million) in sales total.