[njsteve]

One of the reasons for the value difference is name recognition: Everyone on the planet recognizes the name "Hemicuda". Not a whole lot of people outside of the inner circle of knowledgable musclecar officianados recognizes the name "ZL1". Secondly, the Hemicuda was a car that anyone could have ordered and purchased if they had the money at the time, not so with the ZL1. 652 hardtops plus 14 convertibles were built in 1970 and 108 hardtops and 11 convertibles in 1971. You had to really have the inside track to order a ZL1 back in 69. Third, you could order a Hemicuda in whatever bizarre option combination you felt like back then. The ZL1s were "option challenged." With a ZL1 you are hindered by a select number of colors being really the only option, other than the 2? Rally Sports built. And finally, no ZL1 convertibles, which would have been the high $$$ flagship of the marque.