I’m in the business, so know how frustrating it is trying to sell a used, albeit in your case, very lightly used, saddle.
I’ve had success on Facebook, as well as eBay, and have sold numerous saddles through both. If you need help maybe tweaking your ad, or something, just shoot me a PM . Not asking for you to consign it with me, but sometimes it’s in the wording, or the photos you provide, that turn people away etc. I can just share with you what works for me as far as selling on FaceBook and/or eBay.
best luck! I’m a PM away!