Sony A7rV Preorders:
In US at BHphoto , Amazon , Adorama , FocusCamera , BeachCamera , Buydig .
In EU at Fotokoch , Amazon EU , FotoErhardt , Calumet DE , WexUK . ParkCameras UK .
In Australia at CameraPro , Camerahouse , Sony .

David Schloss reviewed the Sony A7rV and his conclusion in short:

Buy the Sony A1 if you need 10fps or faster, buy the Sony a7rv if your current camera is dying or you need a camera today, no one should buy an a9 , and everyone else should wait.