Selling my sole on the internet

Needing to pay off my spur of the moment decision to go to the Final Four, I finally decided to try selling stuff on ebay. I still have no idea what I'm doing, but somehow got 11 pairs of shoes online (or so the emails tell me). But then what? What if I priced everything too high? Or the shipping costs are too low? Maybe my lame descriptions aren't "catchy" enough? Do I have to take everything down if it doesn't sell in 7 days? Damn you, information superhighway. Damn you.

(And yes, I am well aware that a chimp could buy and sell on ebay. Whatever.)