In Nigeria, if you wish to sell a $25 Amazon gift card, there are several steps you can take.

Firstly, you need to find potential buyers. This could be through various online platforms such as local classified websites, social media groups dedicated to such transactions, or even word-of-mouth among your acquaintances. Make sure to clearly state the details of the gift card, including its value and that it is a legitimate Amazon gift card.
Once you have identified interested parties, it is crucial to establish a secure method of exchange. Avoid sharing the gift card details immediately. Instead, consider using a trusted escrow service if possible. If not, agree on a safe way to transfer the information, like providing the PIN or redemption code in a private and encrypted communication. This helps protect both you and the buyer from fraud.
After the transfer of the gift card details, ensure that the transaction is completed smoothly. Confirm with the buyer that they have successfully redeemed the gift card and received the intended benefits. This final step helps build trust and can lead to future business opportunities or referrals.