What's the difference between standard and professional radon monitors?

[jjonas (Jeffrey Jonas)]

@wjones18

I can sell you mine, radon eye pro, case, battery, cables, never used. Just need a calibration which is a bit over $100.00. and then yearly calibrations after that.

Don’t waste your time or breath on this yahoo!

What's a fair price for a radon test with a monitor?

I have ordered 2 Airthings Corentium Pro’s. I know every market is different, but I’m curious what you guys charge. Considering the monitor is being used for at least 48 hours, what do you think is a fair price per radon test?