In Nigeria, if you want to sell a $25 Play Store 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 social media groups dedicated to trading or local classified websites. Make sure to clearly state the details of the gift card, including its value and that it's a Play Store gift card.
Secondly, establish a secure method of transaction. You might consider using popular mobile payment platforms that are widely used in Nigeria. Ensure that both you and the buyer are comfortable with the chosen payment method and that it offers protection against fraud.
Finally, once you've found a buyer and agreed on the terms, exchange the gift card details for the payment. Provide the redemption code or other necessary information accurately and promptly. This way, you can successfully sell your $25 Play Store gift card in Nigeria.