I mean, just look at it! If the BMW 507 isn't one of the most beautiful cars you've ever seen, you may need to have your eyes checked. Despite its beauty, however, the 507 was a relative flop at the time, with high production costs pushing the price in the U.S. to double what they intended, and a strong rival in the Mercedes-Benz 300SL sweeping up prospective buyers. The 507 managed to score some celebrity owners like Elvis Presley, who owned two of them, but after 4 years of production and just 252 units sold, BMW ended production on the verge of bankruptcy. Time has looked fondly on the 507 though, as it's now arguably the most collectable BMW, and routinely sells for 6- and 7-figure transaction prices.