Hi, I am shopping for either a 2012 or a 2010 anniversary Z. When I pull up carfax on the Vin's for the 2010's 9 times out of ten there are electrical service work orders or battery charging service done. What gives? Also, I am concerned that there were only 1000 made but I see several a week for sale. Love the 2010 anniversary but want to avoid a electrical system nightmare. Cars I'm considering are under 10k miles.