A battered looking piano turned up for sale at an auctioneer’s yard. When the bidding started, there were no offers at all. Then a stooped old man walked over, sat at the piano and launched into a performance of Johann Sebastian Bach’s Prelude in C Major. Fingers flirting lovingly over the keys, he brought out a complex interplay of harmonies, hauntingly beautiful sounds that held everyone spell-bound to the last note. When the auction resumed, the price had changed significantly with the winning bid being several times over the reserve price.