How rare is the 1964 mustang?

The Mustangs produced for the first six months or so were referred to as 1964 1/2 or early 1965 Mustangs. All of the VINs began with a 5, indicating model year 1965. The easiest way to tell a 1964 1/2 Mustang from a 1965 is that the front edge of the hood was rolled under in 1965 and was not in 1964. First-year sales totaled more than 417,000.