What is the best marketplace to sell my used books online?

You might would like to condsider www.craigslist.org.

It is free and quite popular nowadays!

It depends on what kind of books but overall I'd say Amazon is the easiest and has the most traffic for books. A monkey could practically sell books on Amazon. Ebay takes a bit more know-how.

However if you're selling schoolbooks check out the line below.

Half.com is owned by ebay.

These are all good, but amazon has the most eyeballs. The problem with having more eyeballs is that there is more likely to be competition out there that will undercut your price. If you are trying to sell at the most expensive price, use ebay.

Definitely EBay or Amazon. Good luck with your selling!

Amazon.

Amazon.com or Amazon.co.uk

The best place for book selling and buying

One at a time them on an auction site or unload on a bookshop.

Why not try eBid the website for zero fee on-line auctions.

Anyone of your choices would suffice. (I'd recommend Ebay or Amazon.com though.)

ebay... or open Yahoo account