OP is offering $50,000 worth of shares, but I doubt they would bring $5,000 on a legitimate market. Maybe $2,000 if he sold fast, before the price steadily dropped to nothing.
Looks like I was overly generous in estimating $2,000.
These shares he wanted to sell for $50,000 are now trading for about $132.
http://cryptofresh.com/a/BANX