It is not an uncommon opinion that 'standard' Rolls-Royce and Bentley models are rather undervalued. All you need do is compare their prices to Aston Martins, Porsches, Ferraris and other luxury vehicles of their day.
The same cannot be said of a Continental. While thein the restoration and maintenance of these thoroughbreds. They need searching out, and the further one gets from the UK the further apart such businesses tend to be, but it is worth finding them if the value of your Continental is to be preserved.