Just found this great offer. No specific end date to the deal, so it could end any day.
This VIP Magic Pass for $99 gets you unlimited entry to Sea World, Movie World, and Wet'n'Wild until June 2016.
BUT here's the best bit…Buy 3 passes Get another FREE! eg. Family of 4, gets into 3 parks unlimited times for 14 months for $299.97.
Dreamworld also have the buy 3 get 1 free as well