For the average DYIer, 4K on a single tool is complete stupidity. I have an OBD2 scanner I paid like 65 shipped for. I've had it several years and used it probably about 100 times. It hasn't melted yet. That's the stupidest thing I ever heard. It also does far more than just pull codes. It has "live" data. It calls it live, but it's really about a 2 second freeze frame. Works good enough for anyone with common sense enough to know what they're looking at. It doesn't do ABS or airbags, but big whoop. It does what I paid for it to do. If you spent 4K on one, that's your problem. There are programs available for the PC that will turn it into a VERY nice scan tool that will do everything for just a few hundred dollars. What was it P.T. Barnum said? "There's a sucker born every minute."