But the LS430s aren't really comparable to the current gen Toyota safety systems. The LS430s have dynamic cruise control but they won't bring the car to a complete stop, the dynamic cruise control in the 01-03s is a little weird (and I think it has some reliability problems). And the dynamic cruise control is bundled with the Ultra Luxury package which has a lot of stuff to break (an extra A/C unit for the rear, air suspension, and double thick glass that can fog internally if it cracks).
The Modern Luxury trim cars have the dynamic cruise control without the air suspension, a/c unit, and a few other gizmos but they're really rare.
And I'd be remiss if I didn't mention it, but the 01-03 LS430 is probably the best used car value in America. You can get a decent one for 5k (they'll ask for 7k but tell them to pound sand) and they're unbelievably nice. They're not Avalons, but they drive like every Toyota ever just with more poise and fluidity.
For the price of 1 air shock replaced at the dealer, you can get an independent mechanic to put the car on conventional suspension and it'll still ride good enough on smaller wheels.
Built on a totally different platform than the Avalon (The Avalon is even FWD)
No pre-collision braking (A partial system was included on some Japanese models, but none on the US model)
No blindspot monitoring
So, hardly "all that stuff".
The LS430 is basically a Toyota Cavalier.
Or - the LS430 is basically a Toyota Century.
You can do the same thing with the big German luxury sedans, but upkeep will be more. Those aren't Toyotas underneath. It's still pretty reasonable for the amount if car you get; just budget for it.