I would like to keep as a unrestored original if possible but I wont know until I dig into the rust I suppose and see how bad it actually is. But it suppose worst case scenario a basic restoration a fair way down the track.
I can get fairly cheap decent rust and paint work down here.
I suppose if I was to put a minimum of 10 k into it would it be worth more than that or am I better looking at something done?
$12k doesn't go that far these days, even for a 2+2 it will only get you a decent driver that has been relatively well kept, but rough paint, tired interior and dirty engine bay. Keep in mind that 2+2 values have been kept low for a long time and so many cars haven't been properly looked after as a result. This makes finding a good 1 hard.
How rare is it to find a 1 owner orginal car with books with these and will they hold or increase in value etc down the track etc. And if so what is one worth restored? I have looked online and there is so many different prices and hard to find something original etc to get a guide.
Pretty rare to be honest, but maybe more likely than finding a 2 seater. For some reason 2+2's have lasted longer with the same owners perhaps because of the extra seats? This is really my anecdotal observation than hard fact, but I feel like most 240z's have been through many hands. Where as 2+2's were in the family a long time. Anything that is single owner, with original books, radio and carbs is now quite a find.
As I said I know Valiants inside and out and sometimes its just as easy to go down the path of buying something restored already, however 1 owner with books etc is huge when dealing with them etc and wonder if its the same with these.
As you know, a restored car is going to be far cheaper in the long run. Some 2+2 bits and pieces are getting very hard to source, interior panels for example and rust repair sections need to be hand made and not available off the shelf. This is because 2+2's are relatively less common and have been less popular on a global level. A lot of reproduction parts now exist for 2 seaters but 2+2's are often forgotten. The cost of restoring a 2+2 and 2 seater is going to be pretty similar. The value of each when done though will be quite different.