Online trading transactions are now widely used by business people, one of which is e-commerce Peer-to-Peer through online stores. With online stores, consumers don't have to bother going to conventional stores to get goods. But shopping using online stores has risks including fraud-prone, products that have been ordered and paid for are not shipped and the quality of the product is not the same. Although there are many problems that cause losses experienced by consumers, but in reality it does not discourage consumers to keep shopping online. The aim of the researcher is to analyze the factors that influence purchase intentions using the Peer-to-Peer social media platform in online shopping. This research uses quantitative methods and data analysis using Structural-Equation-Modeling with Partial-Least-Square software. With a sample of 100 people, it was concluded that economic benefits and sustainable purchases are determinants of consumer satisfaction and purchase intentions. This study concludes that customer intentions and satisfaction in the context of online accommodation and transportation can be generalized in the context of Peer-to-Peer online shopping despite differences in findings.