Buy and resell shoes.
It helps support my addiction and sometimes its very easy to make $50-100 on a single pair. You just have to know the shoe game. Can't knock the hustle either.
Check this out. I bought a pair of "Kill Bill" Onitsuka Tiger shoes for $69.99 in size 11 back in Oct/Nov '03. Last week, there was an auction for the same exact shoe and size, guess how much it went for? $$$
If I ever need some quick cash, I'm cashing them in.
Another situation, I buy two pairs of Jordans for retail at $135 each. Before I get them, I already found a buyer. I end up selling both pairs for $480 shipped to Australia via EMS. Shipping only cost me $60, so I made a good profit from that deal.
The shoe game is bigger than you ever imagined it to be. As long as something has hype, you can always make money from it.
Like Ian said, don't be buying a CrApple.