reliability

So had the whole 6.0 experience and 10k later it's sold. Tried to go back to a gasser, can't do it. So I found a (I believe) late 99 350 4x4 DRW with a zf6, now the guys is asking 13.5k for it with 267k on the clock, looks clean, haven't yet gone to check it out yet. So my questions are, what...