About as good as it gets.
My dad has an 07' FJ Cruiser with 130k miles. It has been to [censored] and back, has done some serious 4-wheeling. It is unstoppable off-road.
His is the 6 speed manual, which is known for the throw out bearing getting noisy. He had it replaced under warranty at 60k and it's been whining again lately. Could probably use a clutch so there might be an upgraded throw out bearing by now.
It also had the alternator replaced at 100k miles.
It has the original gear oils in the diffs, transmission, and transfer case. Original coolant and spark plugs. Just replaced the original belt for the heck of it.
I think it has the original brakes too.