The best place to start is by looking at what others are doing with similar products on eBay. Then make a list of what you like and what you don't like about how their shops are set up, what their policies are, etc. Then formulate your own mini operations plan.
You might also want to read the book eBay Income by Cheryl L. Russell.
A Note From The Editor
Free Webinar: How to Use Customer Service as a Marketing Tool
Tune in October 12th as we highlight some of the best tools to create brand loyalty by leveraging your customer experience data.