As owner of cheaperinbitcoins I am announcing open merchant sign ups, All you have to do is go to http://cheaperinbitcoins.com
sign up with a username/password or with a Bitcoin address. Once you login to your account you can scroll down all the way to the bottom you can click "Login to merchant area" and start selling items. This is not an auction site, although I am looking into options to port an auction house section of the site but until then this will be just perfect for you.
If you'd like to push your products to the main page, go to the "edit" product page fund your product with the product editors instructions and then wait for 2 confirmations and your product will be pushed to the main page.
Please PM me for any suggestions or comments