Proto theme

Have a look at the front-end inactive demo and its admin user interface (you can see how it's approximately looking in the administration section of this theme and you can see a tutorial). This one theme is responsive even in width under 320px (theme is able to adapt to browser width of smaller mobiles). This was my first Wordpress theme that i'd been working on and that's why it's cheaper. Nevertheless, the biggest one seller of Wordpress themes is selling some lower quality for £75 per regular license and £thousands per extended and second sells for £49. I don't mind what you're gonna use it for, respectively, here's no extended license and you can save thousands. It's up to you.