Amazon has the Xbox 360 250 Bundle for $399.99, in addition you will get a $75.00 credit to be used on Amazon, making this $324.99 after credit.
** NOTE: Make sure when you go to Amazon, you look at the page for a box like above. Click on the box on Amazon, to get your credit.
Also, if you prefer Target:
Target has the on the Xbox 360 250 Gb with Kinect Bundle for $399.99, plus you’ll get a $50.00 Target Gift Card with purchase. Save an additional 5% with your RedCard. Shipping is free.
Note: This is an online deal. Quantities are limited.