Russell Turner, their manager, is a great guy and very fair. Still one has to know what they are looking at. Some secretarial signed material here and there on their site.
Not perfect but they are always willing to listen.
For starters, compare the “a”s in the Brian Jones autographs, and the “R”s in the Keith Richards autographs. Mojo may be right about their authenticity. I just have my concerns about them.