Who's best but affordable custom shopping cart provider (e.g. 3dcart, big commerce, shoppingcart)?

[esiow2013]

I'm planning to put up a buy and sell site for shoes where people can upload shoe listings on their own something like ebay.com though we're not the ones who will process the payment. The site we're planning doesn't have a buy/checkout button and paypal integration so it will look like a catalog.  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 are custom shopping cart providers that allow Facebook or Twitter login/sign up integrated in the platform. Let me know if this is also possible in Wordpress by adding a plugin.

Thanks in advance!

[vmialik]

You mentioned an interest to run this on wordpress, if so this should guide you right through it:

http://wpmu.org/turn-your-wordpress-blog-into-an-ebay-style-auction-site/

Also here is a theme to make it happen for you as well:

http://onlinedemo.sitemile.com/?theme=auction

Hope this helps