Thank you again for the suggestions. With a little more patience, we won Hilton San Diego Resort & Spa for $80/night through the PRICELINE link. This is a great price compare to the website price at $209/night. We heard from a friend she said it's still early to book a room on PRICELINE so we stayed within the previous winning price range. I guess it's a good idea to bid early, know the price range you are willing to pay, and keep bidding. Now we are happy with our hotel.