What xbox 360 games trade in for 10 bucks? I mean, I see your point, but if you went in now or even in a few weeks you could probably get 30 or 35 bucks for Kameo, Perfect Dark Zero and other launch titles. 30 bucks off your next game is a good deal if you are giving up something you either didnt really like or are NEVER going to play again and its just going to collect dust on a shelf. Trading in some games if you get it in quick enough is a decent way of shaving off the cost of your next gaming purchases, like 30 or 40 dollars worth and sometimes they have deals where you can trade in 2 or 3 couple year old games youll never touch again and get brand spanking new game you want for free. To me, it seems like a good deal, even if they do turn around and sell it for more. What does it matter, you got a new game and it didnt cost you any money(not really anyways).
I guess some people like to collect them even if they really will never use them again or holds anykind of significant value, but if its something you didnt really like I dont see the harm in trading it in, especially if you get it early and can get 40-50% of the value back
I personally trade in alot of games, pretty much 70% of the games I play wont stay in my collection for long. I only keep really really great games, multiplayer games that will last, most RPGs, or the rare hard to find title that might hold some value later on. But thats just me.