Dropped $340 on a Fluke cable certifier in 2019 and it paid for itself on one job
I was doing grunt work at a small MSP in Phoenix and losing bids because clients thought my Cat6 runs were trash, so I bought the tester, and it caught a bad batch of keystones that a cheap $40 tester never would have flagged, which got me the contract and a maintenance deal worth way more than the tool cost, so yeah, if you are losing jobs over "prove it works" arguments, what test gear are you running?