The only thing on that list worth considering is the RX300, and then only after vetting it some more wrt the replacement transmission. If it is a recent rebuild, it should be no worries. If it is just a high mileage one plucked from a wreck, I'd hesitate.
All the caveats are true. Any RX350 that was totalled out years ago, rebuilt and can still sell for that price begs what was NOT repaired. It should have had enough residual value to justify any repairs within reason. Big red flag. Ditto Honda.
There's a lot of weird statements here WRT Lexus.
I have been a very active long time member at ClubLexus. I've been a moderator at ToyotaNation on this vintage vehicles with the same drivetrain (Camry/Avalon/Solara/Highlander). I have some fair experience, both online and wrenching/owning them. There is no added expense to maintenance in a Lexus vs. Toyota. They are almost entirely automotively the same in this vintage, same with electronics. And they are far more reliable and generally easier to repair in this regard than European makes. Or Hondas. No easier car to work on than a Toyota or Lexus in a similar vintage.
Now, getting at the RX300: one thing to consider with it vs. the 350 is that the 300 is Japanese built, and the 350 Canadian built. Unfortunately, that matters. Nod to 300. The 350 has a chain, but it's moot given the rebuilt status. The problem with the transmission then with Lexus was the Aisin U140E 4 speed. It was a fine design - the problem was supply chain management and using the right grade steel in thrust bearings from a suppler to Aisin. Many planetary gears failed because the thrust bearings they rode on failed. This was endemic in the 99 to 01 ES300 and other vehicles with that range U140 transmission. Similar problems plague contemporary Sequoias - though I don't know why it isn't more common in 4runners and LCs that got the exact same transmission AFAIK. May just be limits of my knowledge and it did also occur there.
If the transmssion in the 300 was properly rebuilt with new components, I'd take it. If you are into these Lexus models, Try to find an RX330. They had the mature 3MZ-FE engine and U150e transmission - as bulletproof a drivetrain as Toyota has ever made (it is still of course belt driven, though). Also, IIRC, Canadian production started with the RX350 and the 330 models were the new body style but still Japanese made. The newer body style was a really nice evolution over that of the 300. In my opinion with these, the sweet spot is the RX330, only made a few years but higher build quality, great transmission, upgraded chassis.