eBay's business model as an online auction marketplace has been very successful. However, eBay now faces several challenges to continued growth. These include slowing growth in key markets like the US and Germany, challenges expanding into new markets like China, and concerns about fraud and the need to improve customer service. eBay is taking several steps to address these problems, such as monitoring transactions more closely and improving policies. However, more focus on security and direct customer service may be needed. If eBay adequately addresses these challenges through management, organizational, and technological changes, it will likely remain successful long-term due to its established business model and ability to adapt.