If you look at the sellers feedback, you can see he's been selling both the $5 and $100 every couple of weeks over and over since September. Of course only the auctions where feedback was left will show. Here's the link to his feed back page:

http://feedback.ebay.com/ws/eBayISAPI.dll?ViewFeedback2&userid=stackon63&&iid=110634961997&sspagename=VIP:feedback&ftab=FeedbackAsSeller