Expected mileage on a 94 4X4 5.9 liter

What kind of mileage could I expect to get on a 94 Dodge regular cab 4X4 gas burner with a 5.9 liter. I am considering the purchase of one that has 140,000 miles for about $2-2500. Is that a good price? Its all in good shape except big dent in the front bumper.
Thanks.