Selling books online

Selling books online

I've got a *lot* of books, mostly ordinary science fiction paperbacks from the past few decades, that I want to sell. Have any of you tried selling books online? How did it go? Amazon/ebay/other? Is that amazon merchant thingy a good deal? I see a lot of books for sale online for less than a dollar--sometimes for a penny. Do those sellers make their profit on the postage and handling?
IDs please and thank you

IDs please and thank you

Two firsts :D

Two firsts :D

Welcome to South Florida! (Picture Heavy)

Welcome to South Florida! (Picture Heavy)

Dudleya?

Dudleya?

A sweet banana pepper…

A sweet banana pepper…

Digging the Learning Curve: Evolution

Digging the Learning Curve: Evolution