I'm confused, what exactly are these, where can a private individual buy one? A Windows license key with (no media) is priced around $120, while an OEM license with no support is in the $50-$90 area, depending on the business relationship with Microsoft. If individuals were able to legally get a Windows license by "restoring" it for $25, it would be a riot, nobody would pay the retail price.
But if that $25 option is not available to consumers, then it makes the comparison to the free disks even more tenuous, and the fair use issue stronger, especially in light of the electronic waste issue. There is a fundamental social value that is being protected.