Hi all, I'm looking to buy a 2011 CTS4 with 70,000 miles on it. It has a salvage title on it but I trust the people that did the body work on it. The only problem is the side curtain airbags deployed. That is the only reason that is keeping me from buying this car. Can a DIYer replace the airbags and sensors and modules? Do you guys think it's worth $9,000?