Amazon has had the Marvel Legends Hulkbuster wave listed for some time, but they were from more expensive third-party sellers. Our good friend Paul gave us the heads up that Amazon has jumped into the game, so you can now pre-order the wave (with War Machine, Blizzard, Vision, Valkyrie, Dr. Strange, Thundra, and the Marvel Now! Iron Man) directly from them for the standard retail price of $21.99 each. It’s not a long wait since Amazon says they’ll ship within the next 2 weeks.
You can find most of them by searching for Marvel Legends Hulkbuster on Amazon. For some reason, the Marvel Legends Vision is also available but doesn’t show up on that search. And the Marvel Legends War Machine is still only third-party seller listings (and more expensive). Since he’s two per case, I am sure you can hold off for now – Amazon will have a bunch that you can pick up later, if needed.