I'm assuming blu.
I saw a poster on another site referring to a Costco in TX that had them on sale for $11.99, so I'm assuming this deal is YMMV.
Also, don't forget they are all on sale at BB's website for $14.99. Just go in the store, print out a copy of the site and price match it in store. I got lucky and they price matched the steelbooks for me instead of the normal blu's.
Amazon also has them all for $14.99 for those that don't like tax.