RM AUCTIONS  offered for sale six unique models belonging to the Bertone collection, amongst which the Lamborghini Marzal dating back   1967. It had been driven by prince Ranieri from Monaco and Princess Grace was sitting at his side at the opening of the Monaco Grand Prix in 1967, its value was quoted  between 1 and 1,8 million Euro; the Lamborghini Bravo dating back 1974, quoted about Eur 150-220.000 and the Lamborghini Athon dating back 1980, quoted about the same value as the Bravo.
Besides these, about 30 more unique models were auctioned on the same occasion.