The simple fact of the matter is that Apple can't offer these systems for free. They just don't have the rights to do this.
Lets look at a couple examples of barriers that Apple faces...
Rhapsody
Rhapsody (like NEXTSTEP and OPENSTEP before it) uses a licensed version of BSD. This is to say, Rhapsody is using a pre-4.4BSD Lite version of BSD (where the restricted parts were removed). This limitation was one of the reasons that Apple created Darwin.
Darwin started out as the Rhapsody 5.2 kernel and then had all of the 4.3BSD and 4.4BSD (encumbered) elements removed and replaced with 4.4BSD Lite elements from FreeBSD (Rhapsody had already started using elements from OpenBSD and NetBSD). This is part of the reason why Apple could give away Darwin when it couldn't give away Rhapsody.
Also Rhapsody uses Display Postscript, which while it was co-developed by NeXT, is a product licensed to Apple by Adobe. Because Apple doesn't own this technology, they are not at liberty to give it away (same with NEXTSTEP and OPENSTEP). And Adobe was planning on charging so much for Display Postscript per copy of Mac OS X that Apple decided to create Display PDF as a license free replacement.
A/UX
While A/UX may use System 6 and 7 as it's Macintosh application environment, the underlying system is based on System V Release 2.2 with elements from System V Release 3 and 4 and some elements from 4.3BSD. Anyone who has been following the SCO vs IBM case knows that System V is not a free OS and can not be given away.
If Apple were to attempt to give away copies of A/UX, they would be responsible for paying the license fees for each copy distributed based on their original license agreement (which would be several hundred dollars per copy).
When is an OS dead?
From Apple's point of view, any OS that can still be used to perform tasks that compete with their current OS is considered competition. This includes NEXTSTEP, OPENSTEP, A/UX, Mac OS 8/9 and Rhapsody.
Even though Apple no longer sells NEXTSTEP/OPENSTEP, they have given Black Hole Inc permission to sell them... with restrictions. If you buy a copy of NEXTSTEP/OPENSTEP with the developer tools, you can not use those tools to make software that you charge for (but you can make freeware or donationware). The main reason for this is that NEXTSTEP/OPENSTEP are still very good platforms for Enterprise Objects and WebObjects.
Similarly, Rhapsody (specially the Server versions) competes directly with the current version of Mac OS X Server in the area of web serving, file serving and netboot serving. And Mac OS X Server came with a copy of WebObjects 4.0.1 which (before Apple made WebObjects free) competed with WebObjects 5.
So in Apple's eyes NEXTSTEP, OPENSTEP and Rhapsody are all still very much alive.
Anyways, this is why Apple doesn't give these systems away for free... and why Apple doesn't like people sharing them with each other.
Just thought you guys might want to know the reason for Apple's position on these types of things.
