Carvana: Identify those activities that could form the basis for competitive advantage Question

3: The purpose of value chain analysis is to understand the building blocks of competitive advantage and where the firm creates value (i.e, where the value created for buyers exceeds the costs of producing its product or service, or margin). So far, in what parts of the value chain (or their linkages) does Carvana seem to have a competitive advantage? In other words, are any of Carvanas strengths valuable, rare, difficult to imitate, and non-substitutable? Justify your response.