Thanks for your question. Welcome to JustAnswer, it will be my pleasure to help you. My name is John.
I am sorry to say that there is not much of a market for these old pump type organs because there is very little interest in them apart from as a novelty factor. They invariably do not always work very well due to lack of use. They often have some quite ornate tops with shelving and mirrors and thus they are used more now as a piece of furniture. Therefore the price obtained if selling, even for a fully working and/or partly restored instrument, can still be under $500 and often at auction they sell for their furniture aspect only for well below $100. I have 3 very similar ones myself, 2 of which I have restored which I will keep because they would never return the time and money spent on them but they are just fun to play from time to time plus they are good exercise for the legs and somewhere to display the ornaments and pictures! I am sorry it is not better news.
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If you are disappointed in the value given ‘please do not shoot the messenger’, I can only give you a value based on the current markets and a reflection of the same or very similar sales. Owners of musical instruments often have a very sincerely ***** ***** that their ‘pride and joy’ is particularly valuable and sometimes it is, but musical instruments unfortunately generally depreciate with age and/or changes in technology. Many thanks and if you need any more help or explanations on the value I have given please contact me before you complete the rating.