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I would try to get ebay to cover the $470 under their guarantees since they have the mediation program and some of those programs have a warranty tied to it. Your other optiojn is to go online and file a small claims court suit in Iowa (I assume the car was bought in Iowa and you live there) and use the proof of the transaction from ebay, the records from the repair shop and the emails showing the failure of the seller to respond. If you can prove to a judge that the seller knew of the defect than yoiu can sue for fraudulant transaction and false advertising. Those are your only options but a suit might get the seller motivated to settle with you.
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