In most all cases, the lease agreement survives the transfer- unless it is a foreclosure. If you do not agree to vacate upon the sale- you are not required to do so. Without seeing the actual lease- nobady could give you a definite answer. There are many resources available, I would investigate the Florida Landlord Tenant Act or seek the advice of a real estate attorney. Often, the buyer or seller will make a "deal" with the tenant in order to make them happy. Perhaps a lump sum payment to vacate of a free month's rent.
Florida Landlord Tenant Act - Below 1-800-HELP-FLA
Mott Marvin kornicki, Broker/Associate
Miami // Aventura // Sunny Isles Beach