Buying a retro styled car is like wearing a knock off Rolex, 99% of the time you could buy a mint and perfectly usable genuine classic for less money and it wont depreciate. A Merc specialist near me sold a W114 280ce in almost as new condition, with bundles of history and under 60,000 miles on it for £7000. Anyone who has ever driven a good one will tell you they are perfectly capable of being driven in modern traffic without stress, aside from the lack of ABS and airbags and higher fuel consumption I cant see why you'd want to pay whatever the premium would be for something that just looked old and lost money hand over fist as you drove it.