depending on the care of the truck. your definately at the last legs of the Ranger motor wise it will likely smoke a little in the morning and may not pass smog checks without fresh tune ups and the like.
if you could find one with a good body but a blown motor at a great price it would be worth getting a new motor and clutch or rebuilt auto trans. they ride good get good milage. you can get a used Ranger cheeper than that Nissan pickup the other guy mentioned and I dont like paying more because it has a name more popular. the Ranger rides better than the Nissan