I think 21.9 with 78K is a bit high for private seller but its about right for dealer.
It took me over a month to find mine in San Diego (9hrs drive away from where I live).
You might find one for about 20K with around 60K miles if you be patience enough.

 

Annnnnd there's your answer. Pass.

Speaking as someone who has driven quite a few Lexus dealer loaner cars in my time, I can tell you that I wouldn't buy a loaner/rental car at ANY price.

Loaner cars are beaten to hell over and over again. There's no way to fully assess the damage this repeated abuse does, but I can tell you that a loaner car will not last nearly as long as an exactly similar non-loaner car due to all the hell drivers throw at them. You could be in for headaches down the road when parts start to fail you'd never have expected.

Also that's not a stable link. You'd have to save it as a PDF and attach it here.