hello i bought a car on sunday from a second hand car trader and have already found major engine faults(suspectd cam damage). Within 2 hours of purchase it would not start as the battery was dead and needed replacing, which in my opinion was obvious as there was battery acid all over the plate which the battery stands.We also feel that we was lured into the puchase as we was told that a couple of scratches on the body work was going to be repaired the following day and the value of the car would go up considrably in price, so we felt we was getting a bargin if we purchased it that day, since then we have valued a few of the identical car spec for spec, year for year with similar milage and have discovered we was charged top price anyway. What are my rights as a buyer.