A study commissioned by organizers at the MI6 game marketing conference has found that of the 75 million people who buy games in the United States, some 49 million also purchase used games.

The study, performed by consultancy firm OTX and reported on by Gamasutra, showed that only 28% of gamers exclusively buy new games, with 60% buying both new and used.

OTX also found that of the 26 million who sell games, 16 million are what they call "New Game Gluttons." These "gluttons" are gamers who finish their games as quickly as possible, with the goal of selling a title at its highest possible value in order to better fund new game purchases.

The firm has projected an increase in used games sales due to the ailing economy, with one in four gamers polled reporting that they will purchase a used game for the first time in the next 12 months.

GameStop is by far the most popular used game hub, pulling in two out of three of every used game purchase. Many analysts have pointed to GameStop's hold on the used game market as an indicator of its resiliency in the face of a US economic recession.