The way you stated this is that if there are problems that were "covered up by the seller." I cannot see how this could be legal. If a seller "covers up a problem," technically, even an expert might not see the problem if it is sufficiently covered up - hidden. This would have to have been blatantly done and it is hard to believe that a clause such as this, could be held up in a court of law - even here. Perhaps I have misunderstood, but, I for one, would not sign a contract that had this clause in it. If it is removed and the seller will not sign, something is up - like a red flag and the seller KNOWS what it is. Ask him Just a thought.