When you have an Amazon gift card worth $100 and want to sell it, there are several options available.

One place you can consider is online marketplaces. There are platforms where individuals can list their gift cards for sale. However, it's important to be cautious when using these platforms. Make sure to read the terms and conditions carefully to avoid any potential scams. Look for reviews and ratings of the platform and the sellers to ensure a safe transaction.
Another option is to approach local pawnshops or second-hand stores. Some of them may be willing to buy Amazon gift cards. But again, do your research first. Find out about their buying policies, such as the price they offer and any requirements they have. This way, you can get a fair deal when selling your $100 Amazon gift card.
You could also try reaching out to friends or family members who might be interested in purchasing the gift card. They may be able to offer you a reasonable price and it can be a convenient and straightforward transaction within your circle. Just make sure to have a clear agreement and ensure the security of the transfer of the gift card details.