i would avoid selling a saddle on ebay at all costs unless you want to pay for return shipping (and price you paid to ship to buyer) because the buyer can return it for any reason (or make something up). saddles are so particular to fit, it’s very likely you get it back. ebay is not what it was a few years ago, they side with the buyer 99.99% of the time. and if someone does return it, pray it is the saddle in the same condition (and not a box of rocks or broken saddle). i sold something on ebay for $2k, buyer returns it but just uses the same zip code and not my actual address (i had proof of this) and ebay still gave the money back to the buyer. i spent hours on the phone before i gave up.
stick to FB groups or consignment, not worth the headache!