Do you have any experience as a seller on ebay (preferably with pristine feedback as a seller, with some bikes in the mix)? Do you have the ability to carefully package and ship bikes at a reasonable (low) price? (Local pickup only = value graveyard on ebay). How are your marketing skills? Ebay is the land of variance and getting anything like full value is a lot of work.
Perfect feedback as a buyer on ebay is meaningless, as sellers cannot give buyers negative feedback.
That leaves Craigs List. Craigs List also takes marketing skills, but you don't have to pack and ship your bike. And C/L is all local, so it depends where you live. And be prepared to get scammers and flaky buyers in the mix (hey, its free.)
Whichever way you go, you need a camera and some great pics.
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Please don't confuse ebay "asking" prices with "selling" prices. Many sellers never get their ask price. some are far from it. Value is determined once an item actually SELLS. Its easy enough to check SOLD prices.