The Used Leica Price Index follows the used market for Leica M and LTM lenses over time. The numbers come from dealer and marketplace listings that we track daily, the same data behind the live price tracker. Each quarterly edition reports the market median, the biggest movers up and down, and how different parts of the catalogue are trending. Price collection began on June 2, 2026, so early editions cover a partial window. Every edition explains exactly how the figures are built in its methodology section, and all prices are in US dollars.