You can buy directly from apogee for $575. It comes with the 620 and the handheld meter.
https://www.apogeeinstruments.com/mq-620-340-1040-nm-extended-range-pfd-meter/
Otherwise the 620 by itself is $415
https://www.apogeeinstruments.com/sq-620-340-1040-nm-extended-range-pfd-sensor/