here's something for comparison. The closest piece of commercial software to Construct is Enterbrain's new Action Game Maker. These are the same guys who made RPG Maker XP, etc.http://www.actiongamemaker.com/
It costs 9800 yen, which is about $99 US, right now.
A few thoughts:
-I discovered Construct and AGM at the same time while looking for shmup middleware. I use Construct.
-Realm Crafter, AGM, and many other indie 'makers' that feature full 3D are topping off at $100 right now. I believe a finished 1.0 version of Construct should compete at $49 US. In fact, the devs could sell Construct through Steamworks if they want a secure way of selling, maintaining, and updating it.