Because example, and many is attached tightly, they are safe to generate onto the highway. These also sometimes come with hinges, the circumstances removal of items and the raising in the cover faster and easier. They also come with locks, and can thus be secured. Expect a hard cover to weight around one hundred pounds. Effectively also pricey than the soft, vinyl variety of truck bed cover. However, they present a better endurance against weather and damage.
A few specific factors to consider in used trucks: wear on present tires, fluids(right amounts and right colour/consistency), check any kind of leaks the particular truck mounted crane dimensions, and also the colour of the exhaust appearing out of the tailpipe- make sure it isn't white or blue.
Some basic rules apply here should you be shopping (sounds like you bought special vehicle that new camper, eh?) for a new hauler. You be aware of the real weight of the new slide in.