reselling tickets is iffy ground, most tickets will be marked as not for resale, which while not enforceable as a legal restriction (I don't think), can invalidate your ticket if you do resell it. I'm not sure what the big police busts of touts are, but I'd imagine there are other laws being broken, maybe selling fake tickets etc.
If you do sell them, sell them for what you paid (face value plus booking etc), or I will look down on you as scum