Ferrari 250 LM 

An elusive and beautiful race car that helped fortify Ferrari's dominance in events like Le Mans. Slightly faster than the GTO at 188 Mph. Only 32 were built between 1963 and 1966, and carried a price tag of around $18,000 new, which was more or less the same price of a decent home at the time. The values exploded over the years, and are currently at about $7Mil US, about 1/3 that of the GTO:

1965: $15000 - $20000
1970: $9000
1975: $28000
1980: $150000
1985: $450000
1990: $6500000
1995: $1500000
2000: $2500000
2005: $4000000
2009: $7000000

The Ferrari 250 LM was a very successful race car, hence their astronomical value.

Ferrari 250 LM by Phassst Eddie August 10, 2009