In Nigeria, if you want to sell a $10 Amazon card, there are several steps you can take. Firstly, you need to find potential buyers. This could be through various online platforms where people are interested in purchasing such cards. Social media groups dedicated to trading or classified websites might be good places to start.

Once you've found a buyer, it's crucial to communicate clearly. Explain the details of the Amazon card, such as the balance, expiration date if any, and how it can be used. Provide accurate information to build trust with the buyer.
After reaching an agreement on the price and terms, you need to ensure a secure transaction. This could involve methods like using a trusted escrow service if available in your area. Or, if not, you could consider meeting in person in a public and safe location to exchange the card details for the agreed-upon payment. Make sure to protect your own interests while also facilitating a smooth and legitimate sale process.