I found an entire case of Masterpiece Starscreams at the Bonney Lake, Washington Walmart today. It took me two weeks of searching, but it was worth it. Three come in a case, and I bought all three. Yesterday, they said they had 6 of them. So, three more might still be available.
Ask for Jessica in Toys, and tell her to check the back room. The case of Masterpiece Starscreams was in the back and not on the shelves.
I paid $30 a piece, so, $90 or so for all three.