: You can find used or "open box" Mk4 units on eBay and Amazon Resale. Note that these may not include the original manufacturer's warranty.
: Platforms like Ubuy or Desertcart sometimes list regional stock, but shipping costs and delivery times will be higher. Why the Thermapen Mk4 is Hard to Find thermapen mk4 where to buy
: The ONE provides a reading in one second , whereas the Mk4 took 2-3 seconds. : You can find used or "open box"
: The ONE features a brighter, white backlight compared to the Mk4. Tips for Buyers thermapen mk4 where to buy