Hot Toys has outdone themselves this time:
Everything is sold separately. So basically you need to buy 13 separate items (6 armors, 6 display cases, Stark with workshop) to complete the scene.
No pricing info yet. But going by what previous figures cost, and assuming the cases might cost a bit less and Stark with his workshop a bit more, I'm guessing around $2000 total for the whole set. That's a very rough guess, but I can't imagine it being much less.