I recently had a battery issue and similar to other posts called the local Lexus dealer and was quote over $200 for a replacement battery. After a simple search and a couple calls I found a Fletchers Tire and Auto in Phoenix who carried an Interstate replacement. Price out the door was $79 with an 84 month prorated warranty. great deal compared to dealer prices. I too am still searching for a reasonable price for the DVD navigation for my 2004 SC. any ideas?