In the 1960s, Detroit built some of the most incredible, tire-smoking, high-performance muscle cars ever to grace theIn the 1960s, Detroit built some of the most incredible, tire-smoking, high-performance muscle cars ever to grace the tarmac. While they were originally built to be affordable street beasts, today these legendary machines fetch astronomical, eye-watering sums at auction.From rare prototype Camaros to multi-million dollar Mustangs, we’re counting down the most valuable muscle cars from the swinging '60s! Which one would you park in your dream garage? Let us know in the comments below!