At most you will be able to find agents who will discount the rates you are seeing by giving up part of their commission folks say. Iv had good luck with Costco who discounts 10% of the cruise portion, but charges $50 pp if you need to cancel.
Rates sure have gone up since December, wave season or the season where folks start booking cruises is upon us and from what I read, bookings may even hit record levels because cruising is such a bargain. Not good for those of us looking for deals huh?? Iv been noticing the prices going up too!!!! Good luck.