Target seems to be having a buy one get one free for most (if not all) Disney DVD's/Blu Rays.
Begins on the 3rd March and ends the 23rd March.
Edit: As many posters have noted, the sale appears to be occurring at a number of retailers, including;
- Sanity (in store/online) - http://www.sanity.com.au/specials/538/Disney_Buy_One_Get_One…
- Big W (in store/online) - http://www.bigw.com.au/thisweekspromotions/disneybuyonegeton…
Its happening at Sanity too