I've seen the prices go up beyond what I paid for Early Saver and then back below. Not claiming to know the complicated mathematical formula they use for adjusting prices. However it appears to be something like this. If the particular cruise is ahead of occupancy by certain dates out - they will raise the prices. If it is below the target occupancy they will lower them to fill the berths. As Donna said it pays to keep an eye on the rates with Early Saver. I would particularly check on Mondays and Tuesdays for price drops.