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Thanks for the question! The good news is that you have a gorgeous organ, but the bad news is that the market for late 19th/early 20th century organs is very small. At auction, other Hinners reed pump organs can sell for less than $100 (see: https://new.liveauctioneers.com/item/2395614_hinners-victorian-oak-pump-organ). I would try listing it through church message boards and through peer-to-peer venues like Craigslist for $250 to 450, or so. You may be able to donate it to a church for a tax deduction as well. Here is one that has been offered on eBay for some time at the $475 level, see also: http://www.ebay.com/itm/Vintage-Oak-Hinners-Organ-Co-/301458728934?hash=item46305727e6:g:1GcAAOSw6aVUndkf - but unfortunately, the value for these is largely decorative as most organists want a newer model with "all the stops" (so to speak).
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