Obscure "By Invitation Only" album purportedly signed (IN FELT TIP!) by all 4 Led Zeppelin band members including John Bonham, plus the Rolling Stones (Mick Jagger, Charlie Watts, Bill Wyman, Keith Richards, Mick Taylor) and Stephen Stills.

They only wanted $975 for it, but were so confident in the authenticity of the autographs that they were willing to send them to be forensically examined. We wonder by whom?