There are two types of dealers: independent and franchise. Generally speaking, all the franchise dealers follow a bare minimum of requirements (aka “100 point inspection” or whatever). Upon trade in, if the car doesn’t meet these requirements, they sell it to an auction. To my knowledge, franchise dealers don’t usually buy from auction... they just get their used inventory from trade ins. Independent dealers however are the buyers of these sub-quality vehicles, who then try to resell them to the public, sometimes with slap-dash fixes. Knowing how even franchise dealer will sell you a problem car, this makes the idea of an independent dealer even scarier. Also worth mentioning, a lot of banks won’t offer loans if the purchase is through an independent dealer.
My take, I’d only buy from a franchise dealer or private party. Be super aware that even from a franchise dealer (of the same manufacturer even) they may try to sell you a seriously problematic car. Happened to me and I ultimately ended up selling the car to an independent dealer who didn’t care about the previous frame damage. Even CarMax wouldn’t take it.
Nice thing about Lexus, you can easily pull from online for all the dealership maintenance history. It’s worth it do the research to make sure you get a good one.