There are several upcoming tax deed auctions in Miami-Dade County. These are the official dates:
The location is 140 W. Flagler Street, Room 908, Miami, FL 33130 starting at 9am EST.
The list of properties being auctioned off are available here:
You may also want to buy over the counter (no bidding needed). The list of OTC deeds in Miami Dade is available here.