If you're following the factory maintenance manual there are three services that are due plus the usual vehicle inspections. The three services are:1) engine oil and filter change2) engine valve adjustment3) engine coolant changedepends on where you go as to how much they charge. as a rule of thumb the oil and filter is about $30 at a Honda dealer, the valve adjustment is about $75 with the gasket and the coolant change is about $50. You don't need a coolant 'flush' as it the car has an aluminum engine and radiator and nothing to rust so nothing to flush out.most dealers also include a tire rotation and cleaning and adjusting the brakes in the 105k service. That would add around another $45-$50. Its certainly worth it if you haven't done the tire rotation or had the brakes checked in a while.