Hi Ray. I can try to help a little and hopefully others will provide information as well. I can tell you for sure that the website is not known for forgeries. They run regular auctions which in my opinion definitely offer real autographs. With that said, some items have been pointed out here in the past as not being authentic but honestly that can be said about every major auction house out there. When they are contacted it is my understanding they have in fact pulled items from their auctions when the evidence points that way. Unfortunately I only like to chime in on authenticity of items when I have a vast in-person experience of which with Amy I do not. We've only sold one of her autographs in our company's history. Because the guitar doesn't have any additional 3rd party authentication from Roger Epperson, PSA, or JSA, i'd proceed with EXTREME caution. Hopefully Roger can chime in or if he offers a 'quick opinion' i'd take advantage of that. Amy wasn't in the states much (banned on multiple occasions) and international collectors aren't out getting the signed pickguards like they are around here so if that's real, it's pretty rare.
They sent me a closer pic if you get a chance to view the attachment. If you can't view it you and you'd like to email me directly I could forward it to you. Thank you again