Auto Trader is a solidly built, responsive theme geared toward the automotive industry. Probably best for a car dealership, car magazine or auto trading site. Comes with a really nice design and plenty of premium features. One of the nicest is the ability to search and filter cars or whatever you’re using as entries.
Themefuse gives you a couple ways to buy themes that are different than some other theme providers. All themes are $49 or $79 for the developer package (includes Photoshop files). They also offer a club membership which is $199 to sign up and $17 a month after that. Joining the club gets you access to every theme, the Photoshop files and all new themes when they come out.