Has it had the 120K kit done to it yet? You might want to find that out and possibly negotiate the price depending on if it has been done or not. It will be an expensive job if you take it somewhere or a cheap on if you do it yourself. Replacing the valve cover gaskets cam seals front and rear main seals etc etc etc can get quite expensive. So you should really find out what has been done to the car. It is only going to get worse if you do not work on cars and have to shell out the money to get the 120k kit done. Just saying.