The Nikkor lens-only rebates are now gone. The currently available Nikon rebates can be found at Adorama and B&H (the Nikon D500, D750 and D810 now come with a free third party battery grip: Watson EN-EL15).
Nikon should introduce new lens-only rebates at the end of this week. I will post the details once I get them.
For our Canadian readers:
For our EU readers: