Strautmann introduced its Verti-Mix single- and twin-tub vertical auger diet mixers in 1994. Offered originally in the UK by the Amazone/Krone company, the product subsequently grew in popularity when handled by Strautmann UK. Then, in 2011, Cambridgeshire-based RECO took on the Verti-Mix range, and over the past four years there has certainly been no sign of any reduction in its on-farm following. So, does this success make a used example a sound buy?