Cars are everywhere, in all ages, shapes, sizes and mileages. Happily, however our guide to navigating the market has been devised and successfully applied by Autocar contributor, car lover and long-time student of the second-hand market Richard Bremner, himself an inveterate investor in older metal. 

The selection rules are few and simple, but rigorous. Bremner starts by using the unique sorting facility of the mammoth Auto Trader website to refine an initial search, sticking to some simple parameters.