Making $$$ As A Ticket Broker vs. CraigsList Arbitrage

I had an interesting discussion over a couple of pints of Guinness with a couple of my 'ole mates. My friend, Greg, makes a full-time living buying concert and sporting events tickets from TicketMaster and then reselling them on StubHub. (It's gambling when you don't know what you're doing; it's a marketable living when you're an educated trader). My other friend, Joe, buys local stuff that he finds on CraigsList--usually stuff that needs fixing up--then resells it on CraigsList for a profit.

As they discussed the pro's and con's of their respective methods, it became clear that they both work their butts off and that neither method was a free ride. It was really an interesting discussion since I'm a big fan of entrepreneurship and working from home.

Any Warriors familiar with either of those methods? Any war stories? Just kind of curious whether either way is a legitimate platform for carving out one's niche in the world.