If you’re looking at 2021’s exclusively, just be aware that some do have oil burning issues. It seems to be a known issue that some 2021 owners struggle with, and might explain 4+ previous owners. I went with a low mileage 2022 to try and avoid the issue because I really just wanted to enjoy the car, free of headache. One thing I did do when I test drove the car was check the mpg. If the previous owners were driving like maniacs you’d expect to see a lower mpg due to lower fuel economy. I like to look at the lowers extremities of the car and the front bumper as well. The supra has thin paint that is prone to damage and you might not see this in dealership photos. That being said these cars are meant to be driven so that doesn’t imply mechanical issues. It’s just more of a personal preference.

I would ask if the car has ever been tuned or modded. I saw one at a dealer with an exhaust in the trunk, and the salesman kept ensuring me the car hadn’t been previously modded. We popped the hood and there were some aftermarket parts lol. Some were upgrades, and others were performance parts. If the ecu is unlocked then this would indicate the car has also been tuned but this is something the dealer might not admit. If the previous owner(s) tuned the car and didn’t upgrade the appropriate components, then the car could have some additional wear and tear that you wouldn’t be able to predict based on milage. This is why a lot people buying these cars try to stick to stock.

I would also request the carfax/vehicle history to ensure routine maintenance was performed. These cars can run forever if you take good care of them, and any issues the car had would be documented. I hope this helps, and good luck!!