All the ones I've received from B&N were via postal mail, which they last sent out about a month ago in advance of Valentine's Day. One of those worked for me, and I ended up with Cloudy 2 3D combo for a little under $20 shipped with tax as well as Pixar Short Films Vol 2 for a little over $17 shipped.
Coupon codes are normally unique as well, if they're the 13-digit variety.
Also, here's a link for a free 2-month trial to the B&N membership:
Thanks, this makes the Wizards Collection 199 with membership coupons and Toy Story 3D collection 40. Thanks for the heads up.