In Nigeria, if you want to sell an Amazon gift card worth $20, there are several steps you can take. Firstly, you need to find potential buyers. This could be through various online platforms such as social media groups dedicated to gift card transactions or relevant Nigerian marketplaces.

Once you've identified potential buyers, clearly communicate the details of the Amazon gift card. Let them know the card's value, that it's a $20 Amazon gift card, and how it can be used on the Amazon platform. Provide accurate information about the card's expiration date and any associated terms.
When finalizing the sale, ensure a secure and reliable transaction process. You might consider using trusted payment methods that are commonly used in Nigeria for such transactions. This helps to protect both you and the buyer from any potential fraud or issues. It's important to maintain transparency throughout the selling process to build trust with the buyer and ensure a smooth transaction for selling your $20 Amazon gift card in Nigeria.