The rapid adoption of e-commerce has transformed how students access goods and resources. However, existing platforms often fail to address the specific needs of campus communities, where students face challenges such as financial constraints, lack of access to affordable goods, and inefficient resource circulation. This research proposes ShareSpace, a localized web application designed specifically for college students to facilitate the buying, and selling of mainly second-hand goods. By addressing imbalances like surplus items left behind by seniors and shortages experienced by juniors, ShareSpace promotes sustainability and affordability within the campus ecosystem. Leveraging modern technologies such as Node.js, React.js, and MongoDB, the project demonstrates the feasibility of creating a student-centric e-commerce solution. The study highlights how ShareSpace solves the challenges of economical pricing and content moderation using proposed solutions. This study also explores the limitations of existing solutions and evaluates the potential of ShareSpace to encourage sustainable consumption and resourcefulness among students.