Dickinson's Real Deal

David Dickinson is at the National Motorcycle Museum in Solihull in the West Midlands, a place that is home to 850 bikes spanning 60 years - as one dealer ends up with the show's smallest profit to date, Mark Stevens is tempted by a tantalus, Fay Rutter considers paying a pretty penny for a pretty Polly, and auction buyers must be convinced that a set of Beatles autographs are the real deal.