Saying a 3-4 year old 200 with a minimum of 20k mi put on by someone else and just out of the factory warranty is better than a new GX550 that tows more, has more HP and Torque, slightly better mileage, 10 year newer infotainment system and safety features, factory rear locker, E-KDSS, and still seats 8 with more compact dimensions does not make sense to me. I love my 200 and will not be getting rid of it when my GX allocation comes up, but other than proven reliability and currently better aftermarket support, a GX550 has it beat in all other areas. Long term reliability of the GX is TBD, but knowing Toyota, that is at least a 200k mi trouble free motor. Past gen GX's have been wheeled hard (seeing more and more on the Rubicon and in Moab) and seem to be holding up really well.
$82k for a fully optioned out Overland + is a bit steep, but you cannot compare that to the price of something that has not sold for new in years. That $82k from 4 years ago is now $92k inflation adjusted.