E-commerce is everywhere. Pricing on e-commerce platforms such as Amazon Marketplace is highly challenging. Sellers typically (i) have limited demand information, (ii) need to decide on prices for many products, and (iii) rival against dozens of competitors. For each seller the challenge is to dynamically price products in order to quickly respond to steadily changing market situations. In this project, we want to build a prototypical marketplace environment to simulate and evaluate different pricing strategies. In this environment, sellers can plug their own pricing strategies and rival with competitors in a simulated market. A dashboard component visualizes ongoing transactions and provides an overview of competing pricing strategies, realized sales, generated revenues, etc. In the end, the goal of this marketplace simulator is to allow students to test and compare different pricing strategies and to compete against each other. Who will come up with the best pricing strategy?