My 2007 V6 has 151k with the original engine, and the engine still runs good.
The transmission, however, is not faring too well. It slips into neutral out of park, misses gears, and whines.
I'd buy it again, I was impressed with the value, as a teenager with limited funds, I got lots of features (10 way power-memory seat, cruise control, dual auto climate control, and lots of other little touches) for just 5.5K. I have some friends that spent about that much on trucks that are 6 years older, trucks in which AC was an option.
Before you buy it, pay a mechanic to take a look at it, and get a CARFAX. I neglected to do these things, and I had to fix a lot of stuff when I first got it, some I could do myself. (Anti roll bar, AC, third row seats) Spending $200 on mechanic opinion is much better than spending upwards of 3.5k on a new transmission like I'll have to soon.