RE: Buying Used: What to look for?
I would only consider it if :
A) it came with some sort of warranty on the engine.
B) you could buy it without the engine ( for a lesser price of course).
You have no idea what its been through and could be the #1 factor to regretting the purchase. If they do warranty the engine then I would only consider it if its the F4.6 and not the K4.6. The F has a black case, the K has a silver one. The electronics are easy to check before purchase and you could always have them show the inside of the diffs if you feel its needed.