i am a trader for sure. alot of games do not have much replayability or much new to offer, so i get its value when its at its highest and i trade it back in after i have beaten the game to a pulp, and i tend to be able to buy a game or two used for the price of that game, then i beat those to a pulp, trade em back in..and the cycle continues...
therefore, i've probably played 2 to 3 times more games then some of my friends have who are complete packrats when it comes to games even though they never touch half of them ever again...
i keep the ones that i know i love and that i know ill replay, but for the most part they become extinct so sell em while they are hot.