This is an awesome idea by the way. I love the choice on Theme Forest but I the flexibility of Bootstrap is brilliant too. I'm also using Bootstrap whenever I prototype anything and being able to just buy and use a theme later on would be incredibly useful (obviously it's not quite that simple, but it could be close). I will almost certainly be buying lots of themes from you assuming you get designs (which I'm sure you will!).
I'm surprised ThemeForest don't have a Bootstrap section yet actually...
I'm surprised that ThemeForest hasn't jumped on this yet either.
From a dev's POV - I won't believe you on the elegance & quality of the source unless I can see it, and that's very much what I'd be interested in paying for (an elegant/clean/flexible UI base). Obfuscating at all is somewhat like selling a fabulous custom car but hauling a dirty tarp over it before letting the prospective buyer get a closer look.
Besides, it's HTML & CSS. De-obfuscating (unless it's seriously mangled, which seems dangerous) is as easy as copying the DOM and composed CSS from Firebug, I imagine, or cut/pasting the files into a good editor and auto-formatting.
Or something; I can't say I've ever de-obfuscated a webpage before; when I check the source, if it's crap I don't keep reading. Which may be part of the point, here.
Seems like something that just punishes people who'd buy it in the first place like most anti-piracy schemes.