Some cars, like the 1967 Shelby GT500, 2003 Ferrari Enzo, and 1970 Hemi ‘Cuda were born legends. But one car had to be rejected, retired, and relegated to obscurity to achieve its legendary status.

A 1-of-10 Chevrolet El Morocco convertible is heading to auction on May 17 in Indianapolis, with no reserve price or estimate from the auction house. That means that almost anything could happen, ...