You can go to http://www.miamidade.gov to find tax related court sales. If you google Broward county you can get their website and look there, too. However, you are going to find that they are not that easy to buy and most are in pretty bad shape and not so great neighborhoods.
Please, please, please don't be fooled by those websites that promote the purchase of properties for $1500 or $5000. Those are all hoax. Those animals do not exist. If they did, you would not hear about it anyway.
The best you can expect in this market is properties that are in bad condition and in bad neighborhoods can sell for as low as 50% of value. If you can afford to buy cash you have a better chance of getting a great deal. But most will sell from 90-70% market value. If you want to see foreclosure for free go to http:// http://www.ewmforeclosures.com.