These are/were the cheapest type you could get in the UK.
For equivalent price I prefer them because there is very little to go wrong/out of calibration.
Just been quoted 3600NT for a made in Taiwan (presumably as opposed to China) model by special order from the Kaoshiung tool shed. Too much for the amount I would use one, really.
Plenty of “click” models available, of course, but they reckoned the beam/pointer style was “old fashioned”