Cost of military grade 80486 processors?

I gotta question or three.

The latest Chinese illegal tech transfer story has the PRC
acquiring eighty MG80486 DX2-5 processors for $540,000. MG seems
to mean "military grade."

See 
http://www.newsday.com/news/nationworld/nation/sns-ap-scholar-guilty-plea,0,623713.story?coll=ny-nationalnews-headlines

That's $6750 per chip which, in its civilian version, went for a
couple
of hundred bucks. 

Is that a standard markup for such items? What does the MG provide
that the vanilla version doesn't? And what would the PRC need with
eighty such things that it couldn't use the commodity version for?