I've got the complete SDK for OS/2 1.3; floppies, manuals, whathaveyou. It's a weighty pile, since this was from the day of glossy-page printed documentation, not "we toss you a CD and it's up to you to find what you need."

I also have OS/2 1.3, 2.0 and 2.1 all in original boxes.

Let me know if you're interested.