I have been using biddingHelper to look for a PRICELINE EXPRESS deal on a 5* Cancun Hotel Zone for Mar 11 2016 to Mar 20 2016. I found what I believe is the Fiesta Americana for $101, when I attempt to book, Priceline comes back with the message" not available due to changing inventory " I have tried several times to book over the last week from a single night on Mar 11 to a seven night stay Mar 12 - 19. I am always getting the same message. The express deal continues to appear but remains un bookable. Any Suggestions?