Commerce ← Knowledge Base Can I limit the quantity of items I'm selling? Can people buy via Retweet or Facebook share? Do I need to have a Payment source to sell and buy items? Do my followers need to register with Chirpify to buy? How are receipts handled? How do I sell something that comes in multiple sizes and colors? How Does Security Work? How is shipping handled? How many listings can we post? Is there a maximum transaction amount? Music: How does a user get my digital content? What if someone replies "buy" to my listing but isn't a member? Why should I sell on Twitter, Facebook, or Instagram? Can I use Chirpify internationally? Can I buy a Chirpify listing multiple times? Can Chirpify integrate with our e-commerce storefront?