An acquaintance of mine is selling someones β€˜87 Bronco on FB for $1500. 147k miles. Runs and drives. 302 with 4x4

Message I got from him:

I know it has an engine knock...not sure what it is. 4x4 works and transfer case was rebuilt about 2 years ago. My buddy bought from one of his friends that needed some $ so he used it as a daily driver, around town mainly, for about a year and a half.

Is this a good buy or should I run screaming? I...have a want for the Bronco but I’d prefer it not need an engine rebuild unless it’d be something that was worth the time and money to do it. Or what should I be looking for? I know very little about the work these things would need possibly.