not to be a negative nancy, but anyone considering this method may want to go with amazon instead of ebay. I used to make pretty good money from epn on their old pricing model, and then my earnings pretty much went to shit with their "improved" qcp. I havent done anything with epn for about a year or so, and seeing this thread made me go back and look to see if they have made any changes recently. They have, and from what I can tell not for the best. They no longer have the 7 day/ 30 day cookies. You may want to check out this link:
http://www.ebaypartnernetworkblog.com/en/2013/09/new-pricing-faqs/
As with anything, do your own research and do what you think will work best for you, but it sounds like their new pricing model, including their new cookie policy, has pissed off a lot of their affiliates.