Back in '04 Costco members could get $300 off in N. California. My recollection is that you could get a list of participating dealers online from the Costco site. I also think I called the Costco 800# from the website and they didn't ask for any sort of member # just what area I lived in. I requested dealers in a less affluent area than where I live and found the discount greater. You might try an area 100 miles from where you live and keep in mind warranty work can be done by any Toyota dealer.