1392980 (Terminal !?) 84 key Model M $50 BIN: ebay 290371323563
2 sold, 4 available. someone bought 1 last week and came back for 3 more (offer pending).
I was doing my weekly search of "IBM Keyboard" but somehow never saw this. In some old posts, Index Worldwide was said to be unresponsive and sold things that they didn't really have in stock.