Used Excavators for Sale in Alabama & Florida. Why buy a new excavator when you can purchase a used one in great condition at a lower price? As a full-service provider and dealer of Cat® equipment, we offer an extensive selection of used Cat excavators, all qualified for industrial use. Thompson Tractor's Used Equipment department is committed to fulfilling your heavy equipment needs with a variety of used Cat excavators for sale. We have locations throughout Alabama and Florida, including Birmingham, Mobile, Panama City and Pensacola.