Buy 2 get 1 free on Dvds and Blurays at Big W there are some exclusions (Page 28)
The following DVD/Blu-ray titles not included in buy 2 get 1 free offer: Zumba, Music DVDs, Fair Game DVD and BRD, Narnia The Dawn Treader DVD and BRD, Tron DVD and BRD, Tron 3D BRD, Mad Men Series 4 DVD and BRD, Red Hill DVD and BRD, Swat DVD and BRD, Megamind DVD and BRD, Little Fockers DVD and BRD, Due Date DVD and BRD, Treme DVD and BRD, Harry Potter Deathly Hallows DVD and BRD.
I didn't notice anything particularly special in the Bluray section however if your after TV Series on DVD you may score a bargain for instance all of the first 6 shield Seasons were $15.92 each so getting 3 makes it $10.61 a season - Bargain
There was/is one copy of Kick Ass available on Blu Ray for $9. Bargain - best movie!