If I were in the market for a P38, I'd be looking at a Jap re-import with low miles - something like this :-
www.ebay.co.uk/itm/173450151823
( the same dealer has plenty to choose from )
This would be less than your £10K max, including new diagnostics, and there will be no rust at all, AND a full service history given the nature of the Japs ......
OMO.![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
www.ebay.co.uk/itm/173450151823
( the same dealer has plenty to choose from )
This would be less than your £10K max, including new diagnostics, and there will be no rust at all, AND a full service history given the nature of the Japs ......
OMO.