Adorama has the Sony A7R III in stock and shipping today. As the latest addition to the A7R product line, the A7R III adds the more powerful battery from the Sony A9. Other improvements promise faster performance for frame rate and other hardware upgrades like a joystick for AF selection, PC sync port and dual SD card slots. Check it out here at Adorama.
B&H Photo is still taking orders for the A7R III but it is back-ordered until Jan. 24, when more stock is expected. Check it out here at B&H Photo.