We looked at buying Dan Gurney's Targa Floria FIA car in about 1973 in New England--for $10,000. The underside was scraped up from his off, and it would have cost a lot to convert to street legal. Despite my desperate pleading, my buddy walked away and bought a street 427 instead.
But, what a ride the guy gave us! The tires spun freely at the slightest provocation. I still have a fading polaroid snapshot of Gurney's FIA car--and a seared memory of it's brutal quickness.