Well, here's one that looks somewhat comparable, and sold for nearly $30...
http://www.ebay.com/itm/RARE-1960s-N...p2047675.l2557
On the other hand, you could take the "low road" and do this with it...
http://www.ebay.com/itm/Vintage-Earl...item2a28deaa70
I don't know which is more far-fetched... the seller claiming it's really signed, or thinking someone would honestly pay $475 for it
