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.
With news outlets welcoming brand journalism with native advertising opportunities, marketers need to be careful that they aren’t misleading or blurring the lines between "real journalism" and straight advertising.