Those are insurance valuations, not selling prices. I always reckon they are about 30% higher than what a car would achieve if sold.
For reference, a friend nearly sold his mk2 CV for around 8k, but backed out of selling it. The buyer was understanding, but was a dealer, who would have marketed it for probably 11K? Nice very tidy vitesse with a few mods (seats, wheels, CVs etc, nothing drastic) and I would happily drive it anywhere.