In addition to all the feedback here i went a bit further and typed in Listia Better business bureau and you can see the complaints here
http://www.bbb.org/sanjose/business-reviews/internet-shopping/listia-in-mountain-view-ca*******929/complaints
And more complaints http://www.pissedconsumer.com/reviews-by-company/listia.html
I have just sent in a request for them to cancel my account!