RM Auctions just announced that they will offer a 1958 Ferrari 250 Testa Rossa (Chassis # 0738 TR) at their annual Monterey auction in August.
RM sold a similar 1957 Ferrari 250 Testa Rossa (Chassis # 0714 TR) at their Ferrari Leggenda auction in May, 2009 for $12,402,500, the world record for the most expensive car ever to be sold at auction.
Ferrari 250 Testa Rossa Headlines RM Monterey Auction