Price variations at hotels are normal. Just like with airline fares. If you look at the piece of paper on the inside of the door, it will list the maximum daily rate for that hotel room. I have stayed in hotels where the maximum rate on the door was $250/night, yet my rate was $60. It is all a matter of supply and demand. I have flown next to people who bought their airline tickets for $200, while I was paying $800 because it was a last-minute trip.
Stuff happens.