You have a legal claim if the seller knowingly sold you a car that was salvaged warranting that the title was clean. Generally, if the contract says AS IS then it is your burden to inspect the vehicle before purchase. If he did not misrepresent any facts then he is not liable. If he did not know or had reason to know that the title was salvage he may have a valid defense. You should consult your case with a local attorney and present him/her all the details that are key for resolving this case.