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The frontier: quadrupeds, companion robots and the first general-purpose humanoids. Small volumes today, extraordinary trajectory — Goldman Sachs projects a US$38bn humanoid market by 2035.
Buying guide: How to Buy a Used Robot Dog UK
Used · ExcellentQuadruped · Manchester
Used · GoodQuadruped · Birmingham
Used · Like newHumanoid · Mayfair, London
Used · GoodHumanoid · Reading
Used · GoodQuadruped · Aberdeen
Used · GoodHumanoid · Sheffield
Humanoid · Cambridge
Mobile manipulator · Oxford
Social robot · East London
Collaborative arm · Bristol
Market contextEarly units are already changing hands. Provenance, firmware status and remaining support matter more here than anywhere else — exactly what our listings surface.
Humanoid robots and advanced quadrupeds are the only category in the Robot Resale Index where prices are rising. The Unitree Go2 Pro is up 18.4% year on year — demand from developers, researchers, and educational institutions is outpacing supply of early-production units with mature SDK and accessory ecosystems. The UK humanoid market opened in mid-2026: used Unitree G1 units are trading at £16,000–£19,000, below the £21,000 new price. If you are waiting for prices to fall, the data suggests you will wait a long time.
The best humanoid robots available or shipping in 2026 include Tesla Optimus Gen 2 (internal Tesla deployment only, not for sale), Unitree G1 and H1, Boston Dynamics Electric Atlas, Agility Digit 5, Figure 03, 1X NEO, XPENG IRON (2027 deliveries), Apptronik Apollo, NEURA 4NE-1, Sanctuary Phoenix, Fourier GR-1, and Hello Robot Stretch 2. Prices range from £14,000 for a used Stretch 2 to over £100,000 for enterprise platforms. The Unitree G1 is the most accessible bipedal humanoid available to buy in the UK today.
Due diligence requires technical depth. Quadruped robots have 25 degrees of freedom across twelve joints; a worn joint bearing creates instability that propagates through the whole gait. Confirm the SDK version is current and supported — research-grade robots often require active support contracts to stay compatible with the latest ROS2 or Python SDK releases. Provenance matters more here than anywhere else: a unit from a university lab with structured use history is fundamentally more reliable than a startup demo unit with undocumented miles.
Demand from developers, researchers, and educational institutions has significantly outpaced the supply of early-production units with mature SDK and accessory ecosystems. The Unitree Go2 Pro is up 18.4% year on year on the Robot Resale Index. Unlike most robot categories, prices in advanced robotics are rising, not falling.
Joint inspection is critical. With power off, move each joint manually and listen for clicking or grinding — worn gear surfaces are the primary failure mode and the most expensive repair. Also check battery cycle count via the SDK (target under 200 cycles) and confirm the SDK account has been unlinked by the seller so you can register your own.
Yes. The Unitree Go2 Pro has full ROS2 and Python SDK support, and Unitree actively maintains compatibility with current ROS2 releases. Confirm the SDK version is current when buying used — research-grade robots sometimes require active support contracts to stay compatible with the latest SDK releases.