I bought this from B&H less than 2 months ago. Literally used for 5 sessions or so, always handled with utmost care! The best monolight I've ever used by far.
I have a Skyport Transceiver RX for it as well, along with the adapter for the Skyport to use on the Ranger RX units.
Comes with a copy of the receipt.
SOLD, shipped and paypalled for the 600RX -- $922.50 @ B&H.
Please call for info, all of my feedback is over on Fredmiranda, and POTN. Same username. 520-603-1117