The OP specifically states that they know the technical part and are asking about the "financial side". But - > "How do I build a service where I can link a bu

The OP specifically states that they know the technical part and are asking about the "financial side". But - > "How do I build a service where I can link a buyer with a seller and earn money on that transaction?" I googled that exact phrase just to see what came up, and the first link was this: https://www.sharetribe.com/academy/how-to-design-your-marketplaces-transaction-flow/ https://www.sharetribe.com/academy/how-to-design-your-market... Which highlights Paypal and Stripe as clear and strong answers to this question, which I'd expect most people asking it to already know - it's the other questions that are tougher.