The rarest I've seen is a Mercedes CLK GTR roadster at a car show owned by the guy who owns the Lamborghini dealership. Only 35 were produced and only 6 were roadsters.
1 of 4 by vinchops, on Flickr
1 of 18 built, 1 of 12 spyders, 1 of 4 feul injected Zonda R by vinchops, on Flickr
last of 14 built, only with black rims, only with glossy carbon fibre My first Marcos by vinchops, on Flickr
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