"its overpriced IS250"
Overpriced compared to what?
It's dearer than the IS200 was but it's a much better (and faster) car.
It's dearer than 4 cyl alternatives but compares favourably to other V6 engined cars from B*W, Mercedes, Jaguar, Audi etc.
(BTW I think the SE-L is pretty expensive, but no one has to pay the extra if they don't want to)