The “new” E-PL6 with kit lens is now for sale for $299 at BHphoto (Click here). Probably the best bang for the buck at the moment!
A long list of special NAB deals has been posted on that BHphoto page (Click here).
You can preorder the new Blackmagic Micro Cinema Camera at BHphoto (Click here) and Adorama (Click here). It will ship in Mid July 2015. The Blackmagic Design Micro Studio Camera 4K can also be preordered at BHphoto (Click here) and Adorama (Click here).
Samys has a Stock of Demo Panasonic GH4 cameras they sell with a $200 off on their eBay Store (Click here).
Olympus Spring savings at GetOlympus (list here).