Too late, got it for 3k. I'm tired of looking for this damn car, I'm never gonna find the perfect one and I might not have the money for it one day. I'll deal with what comes next and see how it goes. The extra cable to the Battery is an aftermarket amp which has been taken out, I will also take out the wire and try cleaning it up. Has some missing engine bay panels and fastners and also the windshield side trims and top, I'll tidy it up little by little.
DnG's post in First Lexus, looking to buy an IS250 2007-2010 was marked as the answer