Frys has the Samsung UN40MU6300 40" 4K UHD Smart LED HDTV for $349 today 7/29 only in stores.
Lowest price has been$399 the past few months
You must have the email from Frys with your promo code.
Link to TV at Frys
http://www.frys.com/search?search..
May be able to get sales tax paid for as well. I was able to finagle a Best buy price match so I did not have to drive all the way over, and I had a BB gift card.
Specs
Resolution: 3840×2160
Refresh Rate: 120Hz (Motion)
Inputs
3x HDMI
2x USB
1x Ethernet
1x Component
1x Composite (shared w/ component)