RM at Paul Ricard. What is the bug?

76 cars from the Guikas collection on offer, all of which sold, in the beautiful setting of the Paul Ricard Circuit, with the RM auctioneer putting on an admirable show and entertaining the crowd for almost five hours straight without missing a beat, not to mention the perfect organization, were not enough to transform it into a success: 55% of the car, in fact, went for below their minimum estimates and the average selling price was 12% lower than expected (€39,089,900 or $44,059,985 against €44,430,000 or $50,133,255). Why?