Actually, it looks like the guy who sued Autodesk for the right to sell used CAD software lost in appeal.
http://en.wikipedia.org/wiki/Vernor_v._Autodesk,_Inc.
Personally, I don't agree with the appeal ruling. I believe once you own it, it's yours to do with as you wish, including resell the software (e-book tutorial in the case of our discussion), as long as (like with paper books) you delete it from your computer and won't have access to the material after you've sold it. Of course, this brings on a whole slew of issues, because if you agree with basic "ownership rights" in general, then you can escalate the issue all the way to asking the question "is it ok for people who own pets to abuse them" and of course the answer there is no.
"Ownership rights" is a very messy question. It is the main reason why we had to enforce that African Americans and women weren't property, because if you applied ownership rights to them you'd get all sorts of ugly, inhumane situations.