When you have a $50 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 look to buy and sell gift cards. You can create a listing on these platforms, clearly stating the value of the Amazon card and the terms of the sale. However, be cautious when dealing with strangers on such platforms. Make sure to follow the platform's rules and take necessary precautions to protect yourself from fraud.
Another option is to approach local pawnshops or second - hand stores. Some of them may be interested in buying Amazon cards. You can visit them in person, explain the situation, and negotiate a price. Keep in mind that they may offer a lower price than the face value of the card, as they need to make a profit when reselling it.
You could also try reaching out to friends, family, or colleagues who might be interested in purchasing the Amazon card. This way, you can potentially avoid some of the risks associated with selling to strangers and may even get a more favorable deal. Just make sure to have a clear agreement on the price and any other details related to the sale.