You already have 15,000 credits. Imagine how many credits you could get from the bidders if you give it free shipping. It wouldn't cost you much, ($2-3) and the trade-off is WAYYYYY worth it! :) , People are a little silly on here anyways.. even a couple dollars on shipping will stop people from bidding.
You can send this in a flat rate priority envelope for $5.90 and that includes tracking, or "Media mail" is a less-expensive option for books, magazines, DVDs, CDs, software stuff like that. Check it out on the United States Post Office website, it can save sellers a lot of $$$ : ) Just trying to be helpful, that's all!! :)