A subject we all agree on!! Cool!
I was pricing them when I bought my Vette - it was one of the cars that made the short list. They were running in the 20-30K range. A Yenko Stinger can run a little more than that - go figure... The prototype Tiger had a 260, but I think the rest had the 289s. I think that they really have not yet been discovered by the 'more money than brains' people.
I've seen 2 or 3 myself - and got pics of one here:
http://public.fotki.com/VRM/misc_racing/sunbeam/
Did you get some pics Mike? I've only seen white ones (the prototype was white also - I would love to see one in green.
Steve