Q Fixed-Lens Full Frame Check the lens, optics, controls, body condition and exactly which accessories are included. M Rangefinder System Pay particular attention to the rangefinder, viewfinder, M mount, sensor, controls and body condition. SL Professional Mirrorless Check the sensor, EVF, mount, stabilisation, screens, ports, controls and supplied battery accessories. USED LEICA · WEX PHOTO VIDEO · BUYER'S GUIDE · AGL BAY Buying a second-hand Leica can open a very different route into the Q, M and SL systems, but condition matters more than the badge on the front. A clean body with the right accessories and a clearly documented history can be a better purchase than a newer example with missing items, uncertain condition or faults that matter to the way you actually shoot.