Not a model that's much in demand by collectors or players. Usually accordions of this age (1920s? by the look of the keyboard ends), unless regularly and recently serviced and in outstanding condition, need many hundreds of dollars to make them into acceptable playing instruments. If neglected, leather valves will harden, felt will be eaten or overly compressed, reeds may corrode, wax seals may crack etc. etc. The cost of remedial work is often far in excess of the market value of the overhauled instrument

If you can get $100 or so, you would probably be doing well. A repairer might buy it for spares, or an artistic type may purchase it as a decorative feature, but otherwise, not much interest I would imagine.

Please don't suggest that "it would do for a beginner". Nothing is more certain than an instrument of this type, vintage and likely condition putting a learner off accordions (and possibly music generally) for life.

One man's opinion. A bit sad for the Charity shop concerned though.

Good luck in finding a buyer.