They are a set of 6, I think. 2 colors of each in a release. There is one other GM, a '54 Chevy, but I didnt care for the color of the one I found (yellow & green). I will get the '54 Chevy in red if I can find it and the Black & Red Pontiac
Here the list for the first release:
1954 Chevrolet Bel Air - Red - 08-01
1955 Pontiac Star Chief - Black and Red - 08-02
1953 Oldsmobile 98 - Pale Blue - 08-03
1951 Ford Crestliner - Pea Green and Black - 08-04
1957 Ford Fairlane - Pale Yellow and Black - 08-05
1954 Mercury Sun Valley - Pale Green - 08-06
1954 Chevrolet Bel Air - Pale Yellow and Green - 08-07
1955 Pontiac Star Chief - Turquoise and White - 08-08
1953 Oldsmobile 98 - Red and White - 08-09
1951 Ford Crestliner - Sand and Steal Blue - 08-10
1957 Ford Fairlane - Light and Dark Green 08-11
1954 Mercury Sun Valley - Pale Blue - 08-12
A subsequent release will have these mildly customized with a cool purple & black Pontiac.
Oh, yeah, I found them at Toys R Us for $5 each. Thats another reason I was picky about colors, since they are a bit more $$.