Where should I sell this?

US seller and buyer, one item, standard account, no promotions or ads. Blank label cost = buyer shipping. eBay: most categories. Whatnot: "Other" category, Standard tier. Etsy includes the $0.20 listing fee. Poshmark buyers pay shipping to Poshmark. Official fee pages: eBay, Poshmark, Mercari, Whatnot, Depop, Etsy.