Hi,
A couple of months ago I was bidding on a Korean Ninja Master's cart on eBay sold from Korea with the s/n 050105. Today I saw this auction, also sold from Korea:
http://www.ebay.com/itm/171697243142?_trksid=p2060778.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT
..and remember seeing this on MVS...