I have a diamond and sapphire piece I'm looking to sell. It's fully appraised and in perfect condition. What sites would you recommend I sell it on, and what are my options with shipping insurance? I currently sell on Facebook Marketplace, Mercari, Poshmark, Depop, Vinted, and eBay. I've been considering Worthy but I'm on the fence about it. Any and all advice appreciated, thanks so much.