Many people who decide to make a living selling collectibles on eBay soon fail. I meet them in the line at the post office. They tell me they just quit their job in order to sell things full time on eBay.I ask them, "What are you doing to find more items to sell?"Only the people who can answer this question last more than a few weeks. The others soon run out of things to sell and just give up.I got started buying trains and toys when I was in grade school.My dad and I collected toy trains and we.