I personally would never touch any of his signed items. Some is close, but most of them are way off. Like Deep Purple, Judas Priest, Marianne Faithfull and Simon&Garfunkel.
The John Mayall Bluesbreakers album is awful to start with. Google John Mayall Bluesbreakers autograph and you'll see an authentic set of signatures that Bonhams had up for auction to compare the album he has listed to….The Eric Clapton isn't even close. Traffic's John Barleycorn album looks like it was signed by my grandson. I can't be bothered looking at what else is being sold by this seller after looking at these two items.