The last stuff I sold on ebay (recently, this year), ebay fees accounted for over 10% of the final value. Paypal takes it's percentage too, on top of that. (3 to 4% or so?). 14% is more than the margin on a lot of things, I don't know how the people with ebay stores do it. I was just selling off some things I don't use anymore, so it's not a big deal to me, but if there fees were better, they would make more off me based on the volume, as I'd sell 20 items a month instead of 10 a year.
Where are you currently selling your 20 items a month? eBay had allowed me to sell items for a lot more than I would elsewhere. Items that go unsold or lowballed offered on Craigslist or local classifieds most often sell for more than expected on eBay.
Also as far as fees go, how many business spend money on advertising just to get their product in front of people? eBay is actually one of the cheapest ways to leverage the most opportunity