If you're into these "open box" sales, you can get Thermapen Mk4 for only $76 while supplies last. While not the same as new, all units are like-new and include the full warranty. They also include instructions, the Thermapen User's Guidebook, and a calibration certificate. In most cases, you won't be able to differentiate these from new stock.
https://www.thermoworks.com/Thermapen-Mk4-Open-Box-0718?tw=VWB
https://www.thermoworks.com/Thermapen-Mk4-Open-Box-0718?tw=VWB