that's a nice advice. I just did that, for the very first time and had never heard about that bidding thing before. Got a room for $105 at Marriott Biscayne Bay Hotel And Marina and they only offer rooms for $149 on other booking websites for same day.
There are many good hotels and restaurants where you can stay during your visit at Miami Beach but in my point of view The Tudor in South Beach is good for you. It is not right on the beach, but it's right behind the Versace Mansion and a 2 minutes walk to the beach and Ocean drive.
Miami is such famous and attractive city of Miami-Dade County. Here I get very useful information about luxury hotel in miami. Also hotel is most important part for getting relaxation and memorable tour for a tourist.