When you buy used or older you know that you have to do repairs when you buy it.
Sometimes the truck is just to far gone and you sell it. The key is to purchase them cheap enough so the repairs don't cost more that the truck is worth. The 1992 and 1997 we used for two years each for a salt truck and then sold for 1/2 of what we bought them for. The salt applications were 10 times worth the truck value. Just be smart about, its is about what you keep not what you spend.