You and I know things are sold cheap on ebay. I bought them when if they first came. If you are still doubting sir, you can call America Mint and ask how much it retails for. I have showed you how to verify that.
Great auction - fanned you. Great coin! Just a little tip - if you ship it out of the country - on the Customs slip - do not put coins or gold flakes in the "product description" area. I did one time when shipping coins to customer in Canada, and customs confiscated it because I didn't have a "Coin Dealers License", and when they take it - you don't get it back. Hopefully others can learn from my mistakes. Just a friendly tip. But like I said Great Auction, watching and possibly bidding, depending on how high it goes. Good luck on this auction! I will post this auction on my Facebook and Twitter pages to try to get you more bidders.