If you've had problems finding the right WordPress theme, you can get some good suggestions this way. Let's say you're trying to make a site about selling 'skin care' products, go on Google and type "skin care (or whatever you need) powered by wordpress". People often forget to remove that from their theme's footer. Visit the websites and right click on the page. Click view source and hit Control + F. Type "theme" and you'll get the theme name. All you need to do now is search the web for a nulled or shared version and you're good to go.