Thank you for the replies, very informative.
I checked the web site 'Vref', who stated that the C 177 along with the C 172 were in a small group of single engine aircraft who's values were on the rise in the U.S., and that the long decent of prices of aircraft had finally turned the corner. A good time to buy.
For those interested there is a wonderful web site maintained by Cardinal owners, Cardinalflyers.com.
Thanks again,
White Bear.