The themes are almost too simple to be worth paying for. If this were a free resource, I think it would be very popular and a great time saver. In that case, perhaps you could make money off of affiliate ads.
Thanks for the feedback. They are simple, but I believe they can save people a great deal of time still. Customizing bootstrap so it doesn't look like bootstrap can take a few hours. I tried to make the prices very cheap. All three themes for $6.
Interesting- Commenting system on Corgi looks awesome.