Also, make sure the leveling cables are up to date and not over their year or run time limits.
LRIIIs didn't use leveling cables, they used fiberglass rods with yokes pinned to them, with chains to ride the sprockets.
the failure point was the yokes pulling loose from the leveling rods.
there were also many problems with the upper boom cables (used to raise and hold the upper boom) they used 2 cables, one cable was not enough to support the weight and 2 cables were overkill (strength-wise) the issue was breaks in cable strands and failure of a cable, thereby overloading the remaining cable and causing failure of it as well. that brought the entire upper boom crashing down, with deadly results. If memory serves (13 years ago
) the threshold was 6 broken strands per cable bundle made it declared out of service until both cables were replaced. It was tedious and time consuming checking each strand in those cables, especially when hidden, or covered by grease. Even then, you could only inspect the outer layer of strands. I've seen old cables (that were replaced) cut open after removal only to find the outer layer looked good, while the inside was merely powdered rust. Scary.
Unless this boom was well taken care of, inspected and repaired frequently, with all records pertaining to that on hand, I personally would steer clear of this truck.
$30K might sound like a deal, but imagine putting another 10-15K into it just to operate it safely. now imagine how new and nice a truck you could buy with that $40-$45K.
-Ralph