Ed,
Even that would only give us an idea of close to how many actually exist. I know of three just in this area which have been junked in the past years and no longer exist, but would still show up on the manufacturers list as having been sold. About 6 years ago we had 10 to 15 cobras here and now I can only find about 5. But it would be interesting to know how many the manufacturers actually have sold.
Ron
