value of a 1970 Sovereign

[ewaegeman]

Hello .....
Just like to get some ideas on what a 31 foot 70 sovereign be worth, or what the current value is.
A good shell, nicely polished to mirror finish, new lights, interior : all the original cabinets and interior, a few doors missing but otherwise ok, original appliances, carpet replaced with laminate, problems : black water tank leaking with a big crack around the dumping valve, the ground clearance lower than normal, separation of body noticed at back with sagging in the bathroom.
What should you pay for this?

Thanks.