this portable tach goes to 3500 rpm, the seller wanted 20 bucks, and it's not for a vehicle. It's for machinery, you put a rubber tipped back shaft on the rotating machine, and the portable tach indicates it's speed. I'm guessing it's not much use, and never used, because it's perfect inside that can.
Seller thinks it's worth more than 15 thousand dollars to him.
Everythign you'll need to replace all the wood on a woodie