Bang for buck laser /Infra red thermometer?

Almost any inexpensive laser temp gun will work. It's going to sit in your tool box most of the time anyway. I bought one years ago for about $20 and it still works fine. There are less expensive ones out there that cost less and work just fine:

Helect Infrared Thermometer Non-contact Digital Laser Infrared Temperature Gun 709257434377 | eBay