> If you list the salary as too low, you're sending out a negative signal and will get less qualified candidates

I'm not sure if it has changed now, but Gitlab used to have a big problem with the way they calculated compensation. Their calculations were very heavily weighted against the Numbeo rental prices, which meant you had someone living in London, UK would earn 40% more than someone living in Bristol, UK, even though the cost of living in both cities is pretty similar.