Online Catalog (E-commerce like) Wordpress Themes?

[esiow2013]

I'm currently looking for a Wordpress theme similar to e-commerce/shopping websites like ebay. I'm planning to put up a buy and sell site for shoes where people can upload shoe listings on their own.. The site we're planning doesn't have a buy/checkout button and paypal integration so it will look like more of an online catalog and not a shopping cart.  We will just add a contact number/email in the product listing so a buyer can contact and personally meet the seller. Let me know if this can be done in Wordpress + e-commerce plugins.

I would also like to know if there's a WP plugin that will allow users to use Facebook or Twitter to login/sign up in our website/platform. Let me know if this is possible in Wordpress by installing a plugin.

Thanks in advance!

[Graphics_Online_SEO]

What you are describing is not a shopping cart website; it sounds more like a "classified" website. Maybe the WP plugin below is suitable? I haven't tried it myself by it seems to have all the features that you need.

http://wordpress.org/plugins/another-wordpress-classifieds-plugin/