They're an outfit out of Long Island. I've seen them mentioned on this board before. Within the last few years they've sold a red euro GT5S, a GT-5, and a green USA Pantera.
This one looks like a nice original blue Pantera for $29,500.
http://gullwingmotorcars.com/moredetails.html?85791936&...de=gullwingmotorcars
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