How much rare set of books are worth

[vhson]

Hi all,

I have a six volume set of leather books. They are The Complete Works of William Shakespeare. Published by Thomas Nelson & Sons. They are in good condition. Does anyone know how I would go about finding out how much they are worth?

Thanks!

 

[Ashlea]

I think there's a site for it, but for starters you might see what similar books are going for on ebay or abebooks.com.