Bah, I wouldn't worry about items being on sale. The CSRs rarely notice that sort of thing. They just scan, look over the coupon, and if it works just let it slide. My question is, has anyone gotten them to scan the coupon on a DVD/Blu that's under $14.99, and did the register automatically take it?!? I'm going to find out shortly...
EDIT:
Coupon does NOT work on any blu/DVD priced under $14.99. I tried it on There Will Be Blood ($12.99), No Country For Old Men ($9.99), X-Men 1 and X-Men 2 ($7.99 each). Didn't take anything additional off of those. But I did get them to take 5 coupons in a single transaction, and it worked on all items $14.99 and up:
Bond Vol 1, 2, and 3 were $14.99 each after coupon ($5 for each Bond blu AC is a damn good price)
Air Force 1/In the Line of Fire 2 pack was $9.99 AC