There is another issue that makes selling Construct as a whole a problem; namely, there is one of libraries used by Construct itself, but not game projects, that has a different license than Construct itself. If I remember right, it is the Prof-UIS or something.
By selling Construct, that particular library's license may be violated:
http://www.prof-uis.com/prof-uis/eula.aspx
[quote:7nsnq5hd]9. You may not:
a) sell, rent, lease, or sublicense the SOFTWARE
Which is why Scirra won't ever sell Construct, I believe. But eh, I'll let Ashley and David clear this matter up.