All through my home inspection clients. I probably only do 10 or 15 stand alone tests per year. I package it at a good price so people will actually do it. My own house has high radon, so I use myself as an example in that conversation too. But back to the package: I charge $130 for it. Just the subtle difference of $20 from the normal $150 is huge. I pay someone $50 per unit to pick them up and grab what ever units I can myself. Since all of the units are paid for, it is pure profit. Adding a mitigation system is about $1600 around here. Telling people that if they don’t test, they are risking their health ( which surprisingly doesn’t move the needle) or they are risking having to take the cost of the system on themselves later if they sell, which is almost automatic. People are amazing about saving a buck in these deals. Push that point. I use Radstars btw. Best service on the planet for this stuff.