I won a contest through Rebeat Magazine about a month ago and finally received my prize. 

Peter, Paul, and Mary 50 Years in music and life. It has a signed book plate by both Paul Stookey and Peter Yarrow. How do you think the 'graphs look? (From other examples I've looked they appear good. I also know they have been signing on a book tour.) How much do you think this book would be worth? Does the fact they were signed on a plate compared to the actual book I assume hurts the value a bit? 

Thanks for any info

Adam