Steve,
There is a good website for collector cars. Last time I looked they had 19 cobras for sale. I found mine thru this site. It will give you a good idea of the price ranges ($395K for an original to about $26K for one with a chevy engine) The web site is
www.collectorcartraderonline.com. Go to search and type in your search criteria. Good Luck.
BigJohn in Benicia