Hard pass.
Might be hard to find on a 470 but on my 460 I found one leased by snow birds that wintered in Texas and summered in Mn. according to mylexus history. So it had never seen salt. First thing I did a couple of days after I got it was get it professionally coated with NHOU which is Fluid Film on steroids, as in 2 days after I brought it home in Nov.
NHOU is basically Fluid Film that DuPont made even better. The stuff is still dripping off mine and burning off the exhaust system. DuPont has been a leader in chemical processes for many years.
@skey44 in Greenville, SC put a smile on my face when he mentioned going to DuPont State Forest outside of Brevard NC awhile back. That used to be the DuPont silver film plant for making medical X rays when I lived there at the end of the last Century. But with the move to digital imaging and the end of x ray film they ended up donating the land to the State of NC when they closed it. They know what they are doing with chemicals. They also had a silver film plant in Towanda, Pa. not sure what happened to that one.
For 10 years I would climb under the Taco and Fluid Film it every fall and it did help keep rust in check. But after watching it being done professionally with a high pressure sprayer and getting into places I never dreamed to apply it will have it professionally done from now on. Rust that you can't see on the surface and is inside the frame is the worst for the life of the vehicle.
I'd look for one either that lived in the South its whole life or was owned by a couple of older snowbirds during its life. There is a used dealership in town that sells nothing but used cars from the South here
I would take a look around and see if you have something similar in your area.