a standard service i would pay around $150 for
this would include oil, oil filter, check of basic mechanics, water and coolant top up, check brakes etc
plugs if need be, check diff fluid etc
a major service i would pay around $500-$700 for
this would include standard service + new plugs + fuel filter + air filter + gearbox oil and whatever else may be needed
timing belt at 100,000 allow $400 for that alone
for dyno check around $60
which is just a power check, theres nothing to tune here