I am an eBay member. I have manged to buy and also sell products. One hint that I would like to give you while participating in the auction is to put your quote in the last minute before it ends. I hope you understood my point.
I recently moved and ended up selling a bunch of odds and ends (clothing, old magic playing cards, busted electronics) and made a healthy chunk of change. As for making a living selling on ebay I feel its a pretty big challenge right now. Find some beautiful untapped niche and pray it goes undiscovered long enough for you to get it locked down