Marketplace
Just got sent this email from Dick, so all you have to do is mention this deal to grab the $15 off. Only applies to INSTORE purchases $150 and above. There's some other good deals in that email which have been mentioned before, like 10% off Apple Macs, etc.
Ah, no, it is a 4 pack of AA Batteries.
Edit: Fixed
My copy said just to mention the offer - no need to show store staff anything.