The famous saying about Free Open Source Software is that it is "Free as in Free Speech, not Free as in Free Beer."
I'm not going to reference specific licenses here but generally speaking, the spirit of the Free Software movement is that you are free to do what you want (within certain conditions of the license) including give it away, modify it, create derivative works from it and yes, even sell it.
You could do this, I could do this, even someone buying these disks could resell them under the same conditions.
If you did sell a Free product under the GPL, you wouldn't be under any obligation to necessarily add any value to the product such as providing support, training, customisation or implementation but charging for these might be part of your business model.
As has been mentioned, providing media to people who don't have the means to download for themselves or spending time to compile a collection of software or e-books in itself adds value. You could even argue that these people are marketing, promoting and distributing this content to a wider audience which adds value to the originators of the products indirectly.
If the seller were in breach of the terms of the license or were deliberately misleading in some way that might be wrong but selling Free Open Source Software in itself is not ripping people off.
On the flip side, I believe that there was a company recently that was re-selling the Flightgear open source flight simulator (possibly rebranded I'm not sure.) In this case, I don't think the company was in breach of the letter of the law or the licensing of the software but way in which it was marketing was perhaps not up front about the open source nature of the software.
EDIT: Public apology to Keeper for quoting your comment without reading your links carefully enough. Please everyone read my comment in the context of the thread generally.
