agree amazon is cheaper usually. Ebay isnt really the place to buy and sell anymore... Craigslist is the best place to sell merchandise i find. no fees ... selling local... plus wake retail is high so people usually see it on CL and think man thats cheap compared to what i saw at the wake store.
Ebay is great for stuff that is unique and hard to sell (or buy). For me, it's great for hard to find Ducati parts that you would never find on CL. I also parted out my Aprilia on Ebay, after I had no success through other services.
I use Craigslist exclusively to sell things. Ebay got too expensive to be worth it. Craigslist is losing my favor though, since they keep shutting down the various aggregators with legal action. Craigslist is useless without an aggregator.