The rapid growth of cosplay communities has also created a potential for a new e-commerce platform specifically for cosplay equipment. This paper utilizes a comparative study to explore and analyze multiple e-commerce platforms that buy and sell cosplay-related items. By examining the features implemented in various platforms, this study aims to understand the essential functionalities that not only aid in a smooth and enjoyable experience but also cater to the unique needs of cosplay enthusiasts. The findings could provide insights into designing an effective marketplace platform that truly understands and values its users.