Carnival group seems to be having a sale across certain brands.
FYI only a major TA is offering inside cabin on your group cruise (for over55s) for $999. It may even come with OBC.
I know, I know it is not exactlty the same deal but maybe you could use that info to get the prices lower - just a thought.
Price reduction doesn't influence me one jot - it is Wimbledon fortnight and that comes first.