Ebay is an interesting conundrum for selling artwork. It CAN be a good place to gain visibility for your work, and establish the value. On the other hand, if you want to move into traditional gallery sales, many galleries won't touch you with a ten-foot pole if you have an Ebay sales history. If you want to test the waters, it's one way to start. Better though would be to do the cafe/restaurant circuit, and move up from there.