That seems a good deal. KBB is BS. Check service history, including the T-belt at 90k. You should see plug changes at every 30k minimum and throttle-body cleaning, too.
Did you carfax
it? I suggest doing this. Check that title.
Look into the shocks and springs. Suspension is pretty notorious for weakness. If original, likely shot. See if the tops of the coils are collapsed (they are progressive, and the tops collapse faster, coils almost touching each oither) and the yellow OEM Bilstein shocks. The typical shock "bounce" test doesn't really reveal this. Go over some big bumps, deep driveway/gutters, and higher speed rough highway and curves if possible to reveal squishy, bouncy handling.
Check the leafs to see if they are frowning. These can lead to a sloppy, bouncy ride too. If the are frowning, you will not be ableto do an AAL (if you wanted to).
This can cost some coin to correct.
The weatherstrip (rubber-covered metal trim) at the bottom of the door windows tends to weather and crack. You can replace these easily, cost about $35 each at the dealer. The latches on the pop-out Xcab windows tend to break. Check these. Also open the little comartments under the back seats to look for anything fishy, like interior rust/flood damage.
Oh yeah, the clutch pedal bushings may also be squeaky/broken, so you might notice that while shifting. They can be replaced easily enough.