We just purchased a 2008 RX 350 with 75K miles at a local dealer (not a Lexus dealer), has NAV, Bluetooth and back-up camera, very good condition inside and out, clean one-owner Carfax and a regular and uneventful maintenance history on Lexus.com, we had it serviced at Lexus dealer (75K) with no issues found, for $22.3 K (in SF Bay Area).
It is a delightful vehicle, enjoying it greatly...