First off all, i tired googling this, so go easy on me.
However, a few months ago I'm sure I read somewhere (probably on GF though), that there was a trade in available where you could send in you're old 360 console for a new slim.
Was that like a thing at some point, or am I making this up in my head?
Cause my 360 is super messed up. It can't read games right out of the box, and here I am thinking those used games I bought stopped working because they were too degraded. --- Mo' buildings, mo' problems
Try calling gamestop to see if they trade in broken XB 360's. They used to take them in for store credit if you used it towards a purchase of a slim, but I can't say if they still do. Too many people brought in broken 360's, so they might have stopped. Call & find out.