I have used Priceline "name your own price" many times and love staying in the 4 or 5 star hotels at regular hotel prices!! Our best deal was for Vegas.....as we got a very good priceline price and we had arranged for two beds.....but when we checked in they only had king rooms.....so they upgraded us to a suite(actually a fairly big suite)!
Enjoy your trip and keep trying.....I start with a really low price and then just increase by $5 or $10 each time (every 24 hours) until I hit the "cap" I am willing to spend.