Finally I bought 2009 LX 570 with 120k miles on it. I had it inspected at local Lexus dealership. They did multi point inspection and OBD diagnostic. It came out clean. Now I would like to know a good independent mechanic in Chicago preferably in Northwest suburbs. I would like to make sure everything is well taken care of from now on wards. Not sure taking it to Dealer or to a local mechanic shop because of the concerns around the expertise. Any referrals greatly appreciated!