In Nigeria, if you want to sell a $15 Amazon card, there are several steps you can take. Firstly, you need to find a reliable platform or community where people are interested in purchasing such cards. Social media groups dedicated to online transactions or marketplaces within Nigeria could be good starting points.

Once you've identified the platform, create a clear and concise post about the Amazon card you're selling. Include details such as the card's value ($15), its authenticity, and any relevant information like the card balance. Be honest and transparent in your description to build trust with potential buyers.
When interacting with potential buyers, respond promptly to their inquiries. Provide accurate answers and be willing to negotiate the price within a reasonable range. Once you've reached an agreement, ensure a secure and smooth transaction process. This might involve meeting in person at a safe location or using trusted payment methods that are popular in Nigeria to receive the payment for the card.