Maybe others were aware of this, but it was news to me that IBM is now peddling old and refurbed merchandise and parts on eBay. Nothing directly OS/2 related, but lot's of systems (Netvistas, ThinkPads and servers(need an AS/400?)) and things like network cards, monitors, drives, controllers and RAM. I didn't see any software listed. Not sure how prices compare with other outlets, but if you are looking for something obscure, this might be the place to look.
http://www.ebaystores.com/ibmauthorizedauctions
Source: OS2VOice