86-87 Fleer has been subject to counterfeit for ages, from what I've read, MJ of course is the most one duplicated.
They managed to recall a heap of these, and stamped them all REPRINT, so people would know.
They can still fetch a small price, roughly $20AU at times.
Chad and others might like to add a bit more to this, as I'm not 100% for sure the whole story.
There is also cards NOT stamped reprint, look EXACTLY the same, and ARE REPRINTS!!
(I wouldnt have a clue how to tell the difference)!!