Usually I just check ebay and see if any are selling !! They really don`t have to be the same one as long as its a similar genre !! Of all that are listed only two have bids one is of horse racing at $20.+ the other is a large chromolithograph of the USS Constitution at $199. Although there are all kinds of starting prices,,it doesn`t mean a thing if no one is actually buying them,, and they are not !! That's why you can`t go by any items "book value" I can ask whatever price I want,, but getting someone to pay it is a different matter !! Doesn`t mean its worth what I ask !!