You get up to $375 credit on the A7-A7r and A7s purchase if you trade in your DSLR at Amazon US (Click here to get all info). And as you see from the image on top they kindly invite Nikon shooters to give up their camera :)

These are the savings in detail:

$255 off the Sony a7 interchangeable-lens camera
$300 off the Sony a7K interchangeable-lens camera
$345 off the Sony a7R interchangeable-lens camera
$375 off the Sony a7s interchangeable-lens camera
$75 off the Sony 28-70mm F3.5-5.6 FE OSS interchangeable standard-zoom lens
$180 off the Sony 24-70mm F4 Vario-Tessar T* FE OSS interchangeable full-frame zoom lens
$150 off the Sony 55mm F1.8 Sonnar T* FE ZA full-frame prime lens
$120 off the Sony 35mm F2.8 Sonnar T* FE ZA full-frame prime lens

[shoplink 27662 ebay][/shoplink]

For a limited time you save $100 and get also a free extras on the Sigma 28-250mm A-mount lens on [shoplink 27662 ebay]eBay (Click here)[/shoplink].

Sony eBay deals:
[shoplink 27611 ebay]Sony A7r with plenty of free extras for $1864 (Click here)[/shoplink].
[shoplink 27610 ebay]Sony QX10 for $149 (Click here)[/shoplink].
[shoplink 27609 ebay]Sony HVL-F43M for $338 (Click here)[/shoplink].

A7-A7r-A7s trade in:
up to -$375.00 trade in saving offer on A7-A7r-A7s running at BHphoto (Click here to read the details).

Current Sony US deals:
RX100 for $413 at [shoplink 27574 ebay]BigValue eBay (Click here)[/shoplink].
RX100II for $571 at [shoplink 27575 ebay]BigValue eBay (Click here)[/shoplink].
Save $380 on the Sony VGC99AM Vertical Grip with Sony A99 Digital SLR Purchase at Amazon US (Click here).
Save up to $200 on Select Sony Lenses with a Qualifying Sony Compact System Camera Purchase at Amazon US (Click here).
Save $50 on Select Sony RX-Series Digital Cameras at Amazon US (Click here) and SonyStore (Click here).
Buy a Qualifying Sony Alpha Digital SLR Camera and Save up to $200 on Select Sony Lenses at Amazon US (Click here).
Save up to $200 on Select Sony Interchangeable Lens Cameras at Amazon US (Click here) and SonyStore (Click here).

There are some price drops on “cheap” E-mount stuff:

The A300 with kit lens sells for $298 at Amazon (Click here). And the Sony 50mm f/1.8 E-mount lens sells with $30 off at [shoplink 27622 ebay]CameraLand on eBay (Click here)[/shoplink].

Sony eBay deals:
[shoplink 27611 ebay]Sony A7r with plenty of free extras for $1864 (Click here)[/shoplink].
[shoplink 27610 ebay]Sony QX10 for $149 (Click here)[/shoplink].
[shoplink 27609 ebay]Sony HVL-F43M for $338 (Click here)[/shoplink].

A7-A7r-A7s trade in:
up to -$375.00 trade in saving offer on A7-A7r-A7s running at BHphoto (Click here to read the details).

Current Sony US deals:
RX100 for $413 at [shoplink 27574 ebay]BigValue eBay (Click here)[/shoplink].
RX100II for $571 at [shoplink 27575 ebay]BigValue eBay (Click here)[/shoplink].
Save $380 on the Sony VGC99AM Vertical Grip with Sony A99 Digital SLR Purchase at Amazon US (Click here).
Save up to $200 on Select Sony Lenses with a Qualifying Sony Compact System Camera Purchase at Amazon US (Click here).
Save $50 on Select Sony RX-Series Digital Cameras at Amazon US (Click here) and SonyStore (Click here).
Buy a Qualifying Sony Alpha Digital SLR Camera and Save up to $200 on Select Sony Lenses at Amazon US (Click here).
Save up to $200 on Select Sony Interchangeable Lens Cameras at Amazon US (Click here) and SonyStore (Click here).