In Nigeria, if you want to sell a PlayStation gift card worth 20, there are several steps you can take.

Firstly, identify your target market. This could include gamers who might be interested in adding a small amount of credit to their PlayStation accounts. Approach local gaming communities, either online through forums or social media groups dedicated to gaming in Nigeria, or offline at gaming events or stores. Let them know about the availability of the 20 PlayStation gift card you are selling.
Secondly, determine a fair price for the gift card. Consider factors such as the face value, any additional benefits like extra credit or bonuses associated with it, and the current market demand. You can research similar gift card sales in the area to get an idea of a reasonable price point. Make sure to price it competitively to attract potential buyers.
Finally, establish a secure and reliable way to conduct the transaction. You could offer to meet in person at a safe and public location for cash transactions. If selling online, use trusted payment platforms that offer protection for both the buyer and the seller. Provide clear instructions on how to redeem the gift card and ensure that the buyer has a smooth and hassle - free experience. This will help build trust and encourage repeat business in the future when selling PlayStation gift cards or other gaming - related items.