Running hot occasionally

I have had the thermostat replaced, but it still runs a little hotter than I have hoped. It was diagnosed with leaking head gasket, but it has not shown those signs in a long time. I have been reading up about the fan clutch so I am debating on making that repair this weekend.

I have had the radiator pressure tested as well as the water pump checked and the body shop said those looked good. I am debating on selling my car because of mileage.