In Nigeria, selling a $100 Amazon gift card can be a viable option for some. Firstly, you need to find potential buyers. This could be through various online platforms such as classified ads websites, where you can post detailed information about the gift card including its value, expiration date (if any), and a clear description.

When dealing with interested parties, ensure you have a secure method of communication. Avoid sharing sensitive information like the gift card code immediately. Instead, have a conversation to build trust and verify the buyer's identity as much as possible.
Once you've established a certain level of trust, you can then proceed to transfer the gift card details in a safe and proper manner. It's crucial to be cautious throughout the process to prevent any fraud or unauthorized use of the gift card. This way, you can successfully sell your $100 Amazon gift card in Nigeria while minimizing risks.