Have not owned a J200, but you can't go wrong with anything in the Prado line. It is truck/off-road royalty. I've had three and am always on the lookout for another!
This... is very weird. I just started looking too. From what I've found they're bulletproof, provided the owner(s) cared for it appropriately. I read/hear 300k to 400k is common in the Land Cruiser/LX line. Around "here" a rust check is probably mandatory. If I can source one local that meets the "criteria," regardless it's a Por15 treatment for sure. Otherwise, it might be best to try to source one from non-salting southern/south eastern states. I'll fly and drive back for the right one.