If you have decided to buy a used pick-up truck then there are certain criterions to look upon in your new truck. They can be ranked as follows: the size of the truck, its engine type, the size of luggage space, the number of passenger seats, transmission types. Though the mileage of the truck is equally important, the most important thing about used pickup trucks is their ability to carry load. It is essential to note the engine capacity as it is directly proportional to the load carrying ability of the truck. So, first decide the requirements of your truck, is it mileage or load carrying performance.