The only time you can get a price like that on a RCL ship, is on the Tuesday specials a week before sailing. I know nothing about cruise.com, I use a travel agent for all my booking about year in advance, so I can get the stateroom I want.
Cruises generally charge a $100 a night for inside rooms per person.
We have generally done much better than that. What is bothersome about what happened today is that we did this over & over again and got the same results, “Oh, they just sold out!” and then giving us the more than double rate. Then they would try to tell us that was the rate for 1 cabin for 2 people when clearly it stated cruise fare for 4. If it “just sold out” why do they keep showing this rate?