The new version (BG-N19-2) of the Vello battery grip for Nikon D850 is now in stock. The old version is currently $20 off.
Update – the B&H listing shows that the speed of the new model is 9 fps where the old version supports only 7 fps:
I could not find any difference in the specs, but the design is definitely changed – here are a few pictures for comparison:
