Yea DON'T DO IT.
I got burned twice.
Both times, they were fake tickets. The second time I got burned, the MSG Security guys told me only tourists get burned by them.
I'm sure, some are legit, but if it sounds too good a deal, it probably is. Just buy tickets online. It's not the Garden sells out anymore like they used to in the 90s.
Tickets are still insanley expensive though. Hmm I wonder why??? (thanx Isaiha)