I listed a card for sale in December and this afternoon received notification it had sold. This was my first time using the system and had totally forgotten I had posted the listing and sold the card to a friend in the meantime. I emailed customer service to inquire how to resolve this and ensure the buyer wasn't charged. Blair responded to my email within 25 minutes of reaching out to let me know the issue was resolved and the transaction was canceled. I was anticipating a complex resolution process with lots of hoop-jumping and forms, but the experience couldn't have been more streamlined and simple. I've had countless negative customer service experiences with eCommerce sites so this interaction was so refreshing and much appreciated. I'll definitely use the site again and would recommend it to others as well. Thanks again!