In the early 1980s I nearly bought an ex Heeresflieger Do 27 after a few hours flying it. A lovely aeroplane but surprisingly noisy. I applied to the UK licensing agency to have it put on the UK register but to my horror it would have cost many thousands of pounds to do so as the type had not been previously through the system. A great pity as it could have been mine for not very much money ( I forget the actual amount ) and would have had a cabin load of spares thrown in.