That 2006 did not spent whole life in CA. I bet it spent plenty time on snowy salty roads. Some one brought it there at some point later. Your dust shields (4) are far too gone and as mentioned here before you need front skid plates (2). I'd ask dealer for those 6 items and a credit for non-disclosed rust. 2006 Limited with V8 engine should fair market from dealer for 8,936-12,403 in good condition in 92629 zip code according to KBB. I'd be asking to adjust the price down to 10,000 or they can take the truck back and refund entire amount you paid. GL
Thanks.. going to think on it after I find out what's up tomorrow. Don't think I'd get anywhere near 10k in an adjustment, even with the rust advertised in pictures before sale(at least in CO)