Be careful with their free trials. I used it around Christmas and did not sign up for membership, although I was intending to later in the year when I was ready to list some nice little antiques I have been sitting on for a long time.

I now find Worthpoint has made regular unauthorised deductions from my Credit Card over a period of 4 months!  Despite emailing them, there has been no response.

If you do a web search, you will find other complaints of the same nature and also complaints about the accuracy of their information ie: they will quote listing price if sales price are unavailable. A lot of their data comes from ebay anyway, who are paid for the information, so I understand. 

This company is also connected to Goantiques who have many complaints against them. 

Do your own research and make your own judgements, but I would like to see Ebay have higher expectations from others they do business with.