Now is a great time to pick up an awesome camera for a great price. The Panasonic GH3 (already on sale) is now available with an additional $300 rebate + 4% cash back
This is a great high end camera for video and photographs at an extremely low price. 
 Adorama

Canon lenses are almost always great glass, though they usually bring a premium price so here is your chance to pick up some awesome lenses with some great discounts of $40-$700 off! Plus, with the new Speedbooster for Canon EF, these lenses would be awesome on your Panasonic GH4 or other mirrorless cameras.

B&H Photo
Canon EF 300mm f/2.8L IS II USM Lens : $700 off  Final Price : $6,599
Canon EF 14mm f/2.8L II USM Lens : $110 off    Final Price: $2,249
Canon EF 24mm f/1.4L II USM Lens : $100 off    Final Price: $1,649
Canon EF 85mm f/1.2L II USM Lens : $100 off   Final Price: $2,099
Canon EF 100mm f/2.8L Macro IS USM : $100 off   Final Price: $949
Canon EF 50mm f/1.2L USM Lens : $70 off    Final Price: $1,549
Canon EF 135mm f/2L USM Lens : $40 off    Final Price: $1,049
Canon EF 200mm f/2.8L II USM Lens : $40 off    Final Price: $779.99
Canon EF 24-70mm f/4L IS USM Lens : $500 off    Final Price: $999
Canon EF 24-70mm f/2.8L II USM Lens : $200 off    Final Price: $2,099
Canon EF 70-200mm f/2.8L IS II USM: $200 off     Final Price: $2,299
Canon EF 8-15mm f/4L Fisheye USM: $150 off   Final Price: $1,349
Canon EF 70-300mm f/4-5.6L IS USM: $150 off  Final Price: $1,449
Canon EF 28-300mm f/3.5-5.6L IS USM: $140 off   Final Price: $2,549
Canon EF 70-200mm f/4L IS USM Lens : $50 off   Final Price: $1,299
Canon EF-S 55-250mm f/4-5.6 IS II Lens : $50 off   Final Price: $249.99
Canon TS-E 17mm f/4L Tilt-Shift Lens : $250 off  Final Price: $2,249
Canon TS-E 24mm f/3.5L II Tilt-Shift: $200 off   Final Price: $1,999
Canon Extender EF 1.4X III : $50 off      Final Price: $449.99
Canon Extender EF 2X III : $50 off   Final Price: $449 

Also available at Adorama

Huge sale right now on the Nikon D610 from B&H.
You get the Camera for $1996 w/ free expedited shipping & 4% Cash back.
It also includes an SD card, bag, and extra battery in case that wasn't enough.
This is an awesome camera at a killer price.
Check it out at B&H