At the risk of starting a controvery, my vote for the best classic sports car of all time is the Alfa Romeo GTZ (tubulare Zagato) of which approximately 100 were made between 1963 and 1965. I believe the cars sold new for around $8400. It weighed around 1500 lbs and had a 1.6 liter engine and was virtually unbeatable in its class. Check it out on Google.