When it comes to selling a $100 Amazon gift card, there are several options to consider. One option is to look for online marketplaces that deal with gift card exchanges. These platforms allow users to list their gift cards for sale and connect with potential buyers. However, it's important to be cautious when using such marketplaces as there may be risks involved, such as fraud or getting a lower price than the card's actual value.

Another possibility is to check with local pawn shops or second-hand stores. Some of them may be willing to purchase Amazon gift cards, although they might offer a discounted rate. It's advisable to call ahead and inquire about their policies regarding gift card purchases to avoid any disappointment.
You could also try reaching out to friends, family, or colleagues who might be interested in buying the gift card. This can be a more personal and straightforward way of selling, and you may be able to negotiate a fair price. Just make sure to follow proper payment and transfer procedures to ensure a smooth transaction.