We pull the trigger on any given cruise based on our preferred itinerary, sometimes sale pricing influences our decisions. I'm wondering if anyone here has ever done this...

You are onboard a ship and go to the future cruise desk to talk about possibly booking a trip. The price is $10,000 (just a random figure).  Instead of paying that, you ask if you can get the same deal for $9000. 

What has been your experience?

Thanks!!