Sorry, Linda but we cannot help you out with pricing. My advice would be to ask a local furrier about it as they will be able to determine if the pelts are still supple and they may also be able to advise you on pricing.
The prices of furs online are all over the place, if you can find something that is similar in style to yours, it would be best to simply compare to the one you have and determine what price you would be comfortable in getting for it.
One always has to be extra careful when selling used furs because even though they may look fine there can be hidden splits and dried out pelts.
I do know that the Arnold Constable store was a high end store. I recently found a lovely wool coat with a label from it.
"At one time it was considered to be one of the largest business establishments in the world and was the oldest department store in America when it closed in 1975."