A month or two ago I booked via the web the Sheraton Vistana Villages 1BR villa for $129/night. I recently re-checked rates and saw the same room on a different site for $99. Called the 800 number for Sheraton and got it for $89/night. I saved $180 total for the 4 nights! Keep checking rates up until the week before you travel. You may find a better deal! By the way, I do the same thing with car rentals as they often lower their rates!