Returns accepted. Always.
People are not going to buy something from you if you click "No returns accepted." They will be skeptical and pass over your item.
Other than that, it's pretty much common sense.
Senbou wrote:ebay can be difficult if you are just starting outI got (29) behind my name and 100% happy-rating or whatever it's called.
most people wont give you a second glance if your score is low, and if it is high they may be turned away if you have bad feedback
its easier to start out as a buyer than a seller to rack up the points