The cost of a standard piano tune is somewhat a fixed price, depending your location. HOWEVER a piano that hasn’t been tuned for several years is not always expected to be tuned all the way up to concert pitch in a single tune. An assessment is always made when first inspecting the piano to determine its capabilities. The more Information you can provide, the more accurate your quote will be. In situations where the piano is particularly flat but is required to be tuned to concert pitch a “pitch raise” tune would be needed as well as the standard tune.