I discovered this by accident. I bought a nice Mambo men's wristwatch for my son, the price was $34.93 on the box.
I thought it was a fair price but when I got to the checkout it was only $15.
I asked the checkout person and she confirmed watches were on special, although there were no signs. So I bought another one for myself. Same deal, $30 or more on the box, $15 at the checkout. Not sure what it applies to so scan them at the red customer scanning places, don't assume they're all cheap, but hope it helps.
Do you know where else this deal applies?