The upcoming RM Auctions event in Monaco will feature no fewer than 22 Ferraris, spanning 60 years of production. Classic cars and a huge selection of Italian bikes will cross the block May 11 and 12 at the Grimaldi Forum. Three Prancing Horses in particular will headline the event, which is held concurrently with the Monaco Grand Prix. The top seller could be the 1957 Ferrari 625 TRC Scaglietti Spider, chassis No. 0608 MDTR. The car on offer is one of just two examples of the car. It was purchased by John von Neumann from the factory and enjoyed a successful racing career in the hands of Richie Ginther and others. Its maiden race was at the Grosser Bergpreis von Österreich at the Gaisbergrennen near Salzburg, Austria, in August of 1957. The TRC was also there at the christening of Laguna Seca, coming in second at the track\'s inaugural race. It was acquired by its current owner in 1981 and, over the past three decades, it has been fully restored, frequently raced and regularly shown at concours events. It will sell with its original, matching numbers Type 625 2.5-liter Ferrari racing engine. RM gives no estimate for this car, but as they say, if you have to ask, you can\'t afford it. Another rare and desirable machine from Maranello is the 1966 Ferrari 206 S Dino Spyder, chassis No. 006. This Dino is the third of 18 produced. Finished in Rosso corsa with the Maranello Concessionaires blue stripe, it made its competition debut at the RAC Tourist Trophy in Oulton Park, England, with Michael Parks behind the wheel. In 1967, it was sold to Gustaf Dieden before it passed to another Swedish owner who raced the car under the name “Team Bam-Bam.” Today it has been rebuilt, restored and certified by Ferrari Classiche. The 206 S Dino is expected to sell for $3.2 million. For those into more modern metal, Michael Schumacher\'s Ferrari F1-2000 race car will be offered. Chassis No. 204 was raced in 2000 by the German champion at the Austrian Grand Prix. It was retired in 2001 and acquired by then-Scuderia manager Jean Todt. It was sold to its current owner in 2006. The F1 car has been restored to race condition including a new engine in 2009. It\'s estimated to sell for about $1 million. Other recent Ferraris secured for RM\'s Monaco sale include: --1952 Ferrari 225 Sport Spyder “Tuboscocca,” chassis 0192 ET, one of the 12 Vignale spyders produced --A one-owner, 2006 Ferrari FXX Evoluzione, chassis 145766, always kept at the Ferrari factory\'s Corse Clienti Department --A highly successful racing 1987 Ferrari F40 Protoype/GT, chassis ZFFGJ34B000074047, one of about eight F40 prototypes and one of seven cars upgraded to F40 GT specifications by Michelotto --A 1955 Ferrari 250 GT Europa, chassis 0391 GT, a benchmark example of Ferrari\'s first, true series-production car --An early 1949 Ferrari 166 Inter Coupé, chassis 015 S, one of just 38 Inters produced from 1948 through 1951 --A beautifully restored 1963 Ferrari 250 GTE, chassis 4093GT --A spectacular 2008 Ferrari 599 GTB Fiorano, chassis number ZFFFD608000159049, driven just 8,000 kilometers For a list of offerings at Monaco, go to www.rmauctions.com or contact RM\'s London office at 44-20-7851-7070.