I was in the same boat for the last month and after looking at about 5 options, picked the one which seem to be in decent condition. 2008, 68k (see picture).
I bought it from trader which means that very little is known about car history.
For start I booked Essential Minor service from local Lexus and was wandering - what else do I need to check?
Transmission oil, any filters, wheels alignment (I noticed car is pulled to the left at very small speed in traffic)? Anything else you would recommend to check or service?