Some conditions that affect the value of antique accordions include the instrument's playability and the condition of the reeds and bellows. Whether the accordion plays in-tune and the range of notes it can play also affect the value. The category that the accordion belongs to also determines its value.
Playability is an important factor that determines an accordion's value. Accordions in playable condition with all their parts intact, including the pine rosin and beeswax that keep the reeds together, command a higher value than those with damaged or decayed parts. Accordions that play out of tune or need a total reed replacement have a lower value than accordions that play in tune.
Additionally, if the bellows of the accordions do not have any holes, patched or otherwise, the instrument fetches a higher price than those with holes in the bellows. If the accordion can produce a wider range of notes, it can fetch higher prices than those with a narrower range.
Accordions generally fall into one of four categories: diatonic accordions, concertina accordions, chromatic accordions and piano accordions. Among these, piano accordions of concert quality and chromatic accordions tend to have higher values, as the former has a bass keyboard with treble buttons and the latter's treble note range is greater.