I really like the last style, Its simple on colors and style that it feels like something a temp shop would have when you have spare time. :3
The first style is lovely too!
And then the middle style seems like something you can do when you have a bit more free time.
I dont actually know what ones you spend more/less time on but from my opinion xD
Edit: Forgot about prices @_@, In terms of pricing I think your current prices are good(maybe you can go up a little if you get super popular) And the last style I can see about 800tbt