Introduced in late-1994, John Deere’s then radical 8000-series tractors spanned 185 to 260hp. These were then superseded by 8010 models at the back end of 1999, power ratings shifting slightly to span 195 to 270hp and with some new features added. But essentially the tractors remained much the same. So what needs to be considered when selecting a used high hp Deere? James de Havilland gives some pointers