Thermapen in closing out the MK-4 thermapen and if you do not have one, this is a great time to get one. They have come out with a new model which has even faster readings (1 vs 2-3 seconds -- mine is 1-2 in real use), a tighter accuracy range, brighter backlight and a 5 year warranty. Great product and I'm sure it is worth the price (they seem to be holding the line on their top of the line price point, which is good). Meanwhile, the remaining MK-4 models -- the first to have the backlight on a rotating display, are on clearance. I bought an MK-4 when they did an Operation Barbecue limited edition as a fundraiser after Hurricane Harvey. I have loved my MK-4 and it's the one I reach for everytime. I waited until I saw the new pen to decide whether I really needed that one, and went with another MK-4. Some of the colors are already sold out, but last I looked they still had the classics.