The H2 is Unitree's largest humanoid — plan the unboxing like a furniture delivery, not a gadget unbox: clear floor space, two people, and read the official operational guidance before first power-on. Work through About H2 and the quick-start in order; the guide's joint-calibration steps come before any dynamic movement.

Used buyers: the H2 is a research platform, so ask for the service history, deployment log, and firmware version, then check the version against the official docs hub. Dexterous hands are a wear item — the official hand disassembly/assembly guide tells you exactly what to inspect before you pay.