For inside warehouse use get electric or propane powered and hard rubber tires are good. For outside use get gas or diesel powered and pneumatic tire. Electrics are trouble free but the batteries may be very expensive if they wear out. For narrow aisles get a stand up rider or walkie electric hard tire. Tell us what you can afford and that will determine the age of the forklift (or hours used). Remember that if you are going up or down a grade you will do better with a gas, propane or diesel powered forklift. Sideshift, lights, and seatbelts are options that may or may not be on the forklift so tell us if you need them.