Dropped $340 on a Mark-10 force gauge for checking panel bond squeeze-out, and it already paid for itself
Had an insurance adjuster fighting me on a quarter panel replacement last month in Tacoma, and being able to hand him a printed pull test reading shut the whole thing down on the spot. What's your go-to tool that costs real money but saves you an argument later?
Ever watch a guy lose an argument over a $15 part? My buddy does mobile dent repair and got tired of customers swearing the damage was already there, so he started taking dated photos with a cheap scanner and printing them on the invoice. Nobody argues with paper in their hand, and that little setup has saved him way more than it cost.