**** yeah this is a great find. dont get too picky.
Maintenance items can add up quick in this rig for sure but this is a good find. I suppose you could find something for cheaper, but then you'll pay the price in maintenance.
Good points made above about hoses and brake fluid. Consider looking closely at some of the high dollar items/repairs like radiator, fan bracket, definitely the AHC components, brake system, timing belt, brakes are kind of spendy, so are tires. Ideally you would hook up a OBD2 scanner and go on a test drive to check for cooling temps and all that
The reality is, these vehicles are so well known theres not going to be any little hidden gremlins. Look over basic mechanical stuff and service history, rust, and if it all checks out its a great deal.
My last two vehicle purchases ( GX470 and old Camry ) I flew many hours away to purchases them, didn't even test drive, handed over cash and drove em both home 10+ hours...Once you know what you want, talk to the seller to gauge if they are trying to hide stuff or not. Check for rust. Check for service history, and go for it. You mentioned a stack of previous service records along with those pics of a rust free underside, I'd already be on a plane. You can always make more money, you cant make more 99 lx470s lol