where to post items for sale depends on the product type and target audience. Amazon is ideal for new and branded items, while eBay supports used and collectible goods. Facebook Marketplace and Craigslist are suitable for local sales. For handmade or niche items, platforms like Etsy work well. Sellers looking to build long-term businesses may choose to launch their own store on Shopify. Each platform has its own fee structures and audience behaviors, so it’s important to match your product strategy with the platform’s strengths for optimal results.