You might consider holding onto him until the next Joe movie comes out and people become interested in those figures again. This is probably a down-time for Joe sales. I don't know how much he sold for, but Storm Shadow used to be, along with Snake Eyes (1985 version) and Firefly, among the most expensive, mass-released MOC figures that I noticed.
Another issue might be grading. Even if it is mint, many collectors won't actually believe it unless it is AFA graded. That can mean the difference between a $150-200 auction and a $600-700+ auction in some instances.