Is what free? Shipping...yes, since I'll be emailing the code to the winner. The Xbox 1 month gold membership...yes, this is a code that you use to get a 1 month free of Xbox Live gold membership.
Wings is one of the badges. Badges are a way to show what you have accomplished so far on Listia. They are given when you have completed certain goals. You see what badges you've gotten on your page, bottom left. You have 3 badges already.
Here is the link to the page about each of the badges: http://www.listia.com/badges