My screen is a £160 75Hz screen, it had a factory range of 48 to 75Hz, a firmware update made it 36Hz to 75Hz, Free-Sync also has a feature called (Low Frame Rate Compensation) which brings the working range to 2.5x the screens maximum range, in my case that brings the lowest frame rate at what Free-Sync works to 30Hz.
So the Free-Sync range of my £160 screen is 30 to 75Hz.
They made the same screen G-Sync, tho that one is now out of production, it cost near £300. on the Free-Sync side its still available, now at £140
https://www.overclockers.co.uk/aoc-...descreen-led-monitor-black-red-mo-035-ao.html
It is true in the early days of Free-Sync vs G-Sync G-Sync had a broader range and G-Sync generally went lower, i don't think thats the case now and a lot of the older Free-Sync screens, like mine, have available firmware patches to bring the minimums down, ontop of that AMD's LFC
as a direct result of this complaint bring the minimums down even more.
So my old £160 screen with a range of 30 to 75Hz i think is perfectly good.
Another fakery some people like to point at is latency, input lag.... this is what Toms Hardware (who are respected Screen reviewers) has to say about that with my screen.
https://www.tomshardware.co.uk/aoc-g2460pqu-144-hz-gaming-monitor,review-32991-9.html
Not bad for a £160 screen.