The document compares eBay and Amazon. It finds that while eBay has more total sellers, Amazon accounts for a larger share of US e-commerce sales and has more total active users. Both platforms charge fees to sellers and offer tools to help sellers manage listings and sales. However, Amazon offers more delivery options while eBay allows selling used products. In conclusion, while Amazon is growing faster, eBay has a more advanced interface and is more user-friendly. Recommendations include improving interfaces and delivery options.