When you have an Xbox Live gift card worth $30 and want to sell it, there are several options available.

One place you can consider is online marketplaces. These platforms allow you to list your gift card for sale. You can set a price according to its value and wait for potential buyers to come across your listing. However, be cautious when using such platforms as there might be risks involved, like dealing with scammers. Make sure to follow the platform's rules and take necessary precautions to protect your personal information.

Another option could be to look for local gaming communities or forums. There might be gamers in your area who are interested in purchasing the gift card. You can post about it in relevant groups or threads, providing details about the card's value and how to make the transaction. This way, you can potentially find a buyer who is nearby and make the exchange more convenient.

You can also try reaching out to friends or acquaintances who are Xbox gamers. They might be interested in buying the gift card from you. This can be a relatively safe and straightforward way to sell it, as you already know the person and can trust the transaction process more easily compared to dealing with strangers on the internet.