I have a FX doppler radar for couple years and last month just picked up a Labradar version 1 from second hand about $450 tmd.
I could get a latest and greatest ver 2 or Garmin, but because I am starting with reloading game for new to me f-class I need more downrange data only the big orange is providing.
I tested the Labradar at my club ranges and it is finicky for reflections, and if I mistake the settings it was picking up other guns as well from 20 meters away. These can be edited in the unit itself or later in PC, but ...
I ended up ordering a reaction trigger for it as well for extra $65 shipped.
So yes, it is not all in the money...