: 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.
: The ONE provides a reading in one second , whereas the Mk4 took 2-3 seconds. thermapen mk4 where to buy
: Some niche retailers like Smokin' Deal BBQ or Smokin Brothers may still have lingering stock, though many list the item as out of stock. : You can find used or "open box"