The actual condition of the body is critical. We had a brown K reg S2 Fulvia berlina in 1978 and even at that young age rust was coming through on the doors, wheel arches and around the window frames along the top of the doors due primarily to the poor quality recycled steel used. Also the car was finished off with much less attention to detail than the S1 versions.
The fact that this car has been standing for a number of years is not necessarily a good thing - cars are meant to be driven!
In many ways I would rather buy a high mileage runner but in this case it is essential to inspect the body fully, partic underneath and be totally realisitic about the potential costs involved. Over the years I have seen several Lancias which have been typically 'bought for restoration'. The owner has disassembled the car, restored all the mechanical components leaving the body to last as it is the largest expense (and is probably worse that thought at the time of purchase) and then the project stalls.
A good one is of course a lovely car to drive.
Buyer beware!
Chris