Not to buy and not fit to wear the Lexus badge.
You will run into egr and dpf issues in no time and that' if your lucky. The d4d engine is dreadful and unreliable. Head gaskets blow left right and centre.
I found fuel consumption very poor for a diesel. In act I get slightly better mpg in my 250 V6 petrol which is a much better car and I suggest if you can find one for sale, buy it.