When you have a $20 Amazon card and want to sell it, there are several options available. One place you can consider is online marketplaces. There are various platforms where individuals list and trade gift cards. You can create an account on these marketplaces, list your $20 Amazon card for sale, and specify the price you're asking. Just make sure to follow the platform's rules and security measures to ensure a smooth transaction.

Another avenue is to look for local classified ads. Some local newspapers or community websites have sections for classifieds where you can post an ad offering to sell your Amazon card. This can be a good option if you prefer dealing with people in your local area. You'll need to provide details about the card, such as its value and that it's a $20 Amazon card.
You might also explore social media groups or forums related to trading or selling items. Many such groups allow members to post about selling gift cards. By sharing your offer in these groups, you can reach a wider audience of potential buyers who are interested in purchasing Amazon cards. However, be cautious and verify the identity of the buyer before finalizing any deal to avoid fraud.