it is worth what you are willing to pay and not a penny more. simple.
as an importer since 2001 and after bringing in and selling more than 200 vehicles i can tell you, you WILL NOT find a nice condition BJ74 out of Japan that isn't a roll back for under $14K delivered to Alberta.
you MIGHT find a decent enough BJ74 already "Canadian enjoyed" on the market for under $14K. we did go through a depression of Land Cruiser prices for a couple years where you could pick one up for cheap.
i don't mind the auto if the engine is turbo'd, if it is NA then the auto can be a slug. Peter (behemouth) can't drive an auto, i bought an auto van off him that had been "Peterized" and, well, to be nice, Peter really should never even sit in another auto ... of any sort. His take on an auto can be dismissed as predudice.
the 13BT manual is NOT a nice off road vehicle, throttle is way too sensitive and the auto absorbs much of that issue.
of course there are those that don't agree, those are also the same ones that will chop off their foot to prove a point.
IF i was shopping for a 73/74 series, i would buy the HZJ73 in a heart beat and turbo and call it a day. same or better fuel mileage as the 13BT, better power, no sensitive throttle issue, no parts supply issues, all round much better rig.
<shrug> each to their own.
the "roll over panel", as it is called by Toyota, would definately not be classified as a "roll bar" in the normal consideration of the term. it would be as strong as the old FJ40 "front roll bar", as called by Toyota.