Take good pictures, you'll need a good digital camera. Items with clear, well-defined pictures sell higher than ones with blurry pictures that look like someone took them with a camera phone as he was walking past. For example, I bought a pair of lightly used Nike sandals on eBay, for $7.49. I was planning to keep them for myself. However, when I got them, they didn't fit. It was my fault, I just underestimated my shoe size. So I took some really nice pictures with my home-made lightbox, they turned out just really bright & clear. I listed the sandals with a starting bid of .99 and they sold for $22.50. That made me a profit of $15.01, which more than covered even the shipping that I had paid. I credit it to the pictures that I took, which were 10x better than the original ones.