Does any one know the approximate trade in value of MAG as of now?  I'm just curious and am wondering if anyone knows...

Are you not enjoying it? Anyways, it depends on how well it has sold so far. If there has been sold many copies since release I guess you can get a pretty alright trade-in value. But I dont think it has done very well. That is just speculations of course.

Im gonna say $20, seems to be the going rate for a gamestop gives to new games that aren't huge name titles. However, i haven't traded in a game since the original xbox so it might be a little more now that games are $60.

cheapassgamer.com has it listed as being 19.50 trade-in value for gamestop.  Plus they have the 50% extra trade-in until the 14th.  So that's about....30 bucks.  Not too bad....it says it is worth 33 for Amazon but if you are lazy like me, I don't want to have to go out and package it up and ship it off.
 
I looked up Heavy Rain because I wanted to sell it and they are only offering 25 for it.  It just fucking came out and only 25!  Lame.

Thanks for the info guys.  I just haven't been enjoying the game very much (and BC2 just came out so I'll be playing that a lot) and might end up selling it...

20 dollars or so its been a long enough time its no longer 30-35.