Two days ago an S-Tron XM9 showed up on ebay. I threw a bid in on it and today was notified that the bid was canceled and the item was no longer available for sale. I contacted the seller and asked what happened and he told me that he sold the bayonet. Turns out that he had no idea what it was and accepted an offer less than half of what the bayonet was worth and probably a third of what it would have brought it the auction ran to completion.
http://cgi.ebay.com/Vietnam-USN-Navy...item483825fd99