I'm at 278 with a 99.6% feedback. Most of that is from selling, but I haven't sold anything in about a year.
As I was trying to support my way through college, I got into selling concert tickets for about a year and a half. I started after I was able to buy a pair of Kenny Chesney tickets that I soon found I could sell for 5X face value. I also soon found out that it wasn't always that easy, although it did supplement my income nicely for a while. I never got into sporting events as it was just too hard for someone with limited resources, but I was able to use the tactics I learned to score some nice Reds opening day tickets.