There's quite a few specials on the Royal Caribbean website, but this New Zealand cruise sailing on 22 February seems like a great deal! The ship is Voyager of the Seas (one of the larger ones) Including gratuities, it works out to be around $72 a night pp for an interior stateroom.
Prices are per person in Australian Dollars based on twin occupancy and inclusive of all taxes & fees (which are subject to change).
not bad