In 2009, a presumably insane person spent over $700k to take the frame of a Ford Mustang and swaped in the guts (engine/transmission/interior) of a new Lamborghini Gallardo. For that amount of money in 2009, a person could have bought 3 new Gallardos ($186,900 each) AND 6 new Mustangs ($20,490 each). In theory, it would at least be kinda cool/ironic if the owner kept it looking like a stock Mustang, but of course they couldn't just leave it there and made the rear end look like a Gallardo (kinda).
This monument to stupidity is available today via Barrett Jackson Auction. The link has the deals: https://bit.ly/2CqTiwk
UPDATE: The link is now dead. Not sure if that means it's sold or the owner pulled it in hopes of salvaging some dignity.
UPDATE 2: Link is back and working! Can't wait to see if this thing sells.