Ken Musgrave/Pandromeda (Doc Mojo/Mojo World) offered 1 Mil $US for Bryce  and was outbid by DAZ - so that might give you an idea what it could cost.
The ownership of various parts of Bryce is debatable and would probably need to be determined by a court of law - something I'd say DAZ doesn't want to do. Who owns the code when it was entirely re-written for the PC and then the PC code was then ported to the Mac?
As far as I know, Eric Wenger still has  a license to the Bryce franchise for a small part of that code.