Flat fee per listing. Percentage fee based on selling price. Find this product on eBay. Small size and much expanded functionality over the Rio 300. USB upload speeds blow the parallel connection away.
Upgradable firmware is nice.
Much more program information is available via the display than on the Rio 300 as well as a bookmarking feature. With no bookmarking feature this was frustrating. The carry case makes this even more difficult through the clear plastic window. I was disappointed in the earphones and purchased an alternate set that I could hear with on the train to work in the morning. Overall, I am pleased.