Small oil leak

I have a small oil leak coming from front of engine, 170k on car, valve cover gaskets or intake gasket????

Is the oil getting on the exhaust? If so I would believe that the oil leak is the valve cover. But if also could be the intake gasket depending exactly where the oil is seen. Since you said the front of the engine, do you mean the area where the belts are or on the side where the radiator located.

if it is over by the passenger front wheel then could be from timing cover gasket happened to mine cost almost 300