Good point -- its definitely not that simple. As a data point, note that Mockingbird, which is transitioning to a paid model, offers a $9/month option as a sta

Good point -- its definitely not that simple. As a data point, note that Mockingbird, which is transitioning to a paid model, offers a $9/month option as a starting point: http://gomockingbird.com/launchinfo/ http://gomockingbird.com/launchinfo/ Similar mockup tools are in the $9-$15/mo range on the low end.