Hello. I purchased a 1992 Chevy Blazer 5 weeks ago from an area man that sold cars on the side of his normal job. He claimed to be a dealer and appeared to operate professionally as a dealer. A coupl of weeks ago the vehicle started making a knocking noise while it was idling then the noise worsened and got louder ever while driving dow the highway. A mechanic diagnosed it as having bad connection rod bearings and said the bottom of the engine would have to be rebuilt. I reviewed the receipts, and it says nothing about "sold as is". Isn't there a case here? Or am I taken? I purchased it for $1800 but for some reason the man wrote the bill of sale out for $1000. I thought he was trying to give me a break on taxes but maybe this was his way of protecting himself from getting into trouble selling me a lemon. I appreciate your advice and if I have a case here....Thanks!