Depending on the age, but a well looked after car from before 1972 carries no tax, and would be very cheap to insure, provided the mileage is fairly low. Getting parts for more obscure ones is an issue, though. I see Triumph Heralds and Vitesse around from time to time; nice cars those, especially the Vitesse, with a 2.0ltr straight six.
For many, it’s the rarity, when did anyone last see an early Cortina, or Anglia, or any old Hillman, like a Minx or Hunter?
The advantage with the Marina is that it’s pretty much a Mortis Minor underneath, many parts were/are interchangeable.
For example, my old ’54 Split-screen Moggie had a 1275 engine, Riley drum brakes and front suspension (King pins), a van rear-axle, along with Koni shocks and 5½x13 alloys