Other than safty, I would find something they made a lot of and ran for a lot of years, an s-10, ranger, explorer, Dakota, blazer, and durangos, would be my pick. They made a bunch of them and shared parts with other vehicles so replacement parts are cheaper and they are easy to work on. When you buy an older car you have to take into account the fact that you are going to be doing a lot of repairs. Personally I drive a dodge, but if I were going to buy an old one it probably would be a chevy, parts are cheaper. Or even get them a half ton pickup.