There are countless sites that offer pre-designed Magento Themes for you to purchase, install, and use on your Magento eCommerce site. However, these themes may not be the best fit for you, and can actually cost you more in the long run.
At first glance, Magento themes and designs seem too good to be true; they are moderately priced, responsive, and usually offer some type of global customization (like being able to change colors and fonts). However, these themes rarely account for any customization you may have in place, or want to add in the future. For example, most themes we have come across only style the main Magento pages (home page, category page, cart, check-out). These themes will usually not work on any special pages you have (like for gift cards) or if you have a customized cart and checkout. Here at iFuel Interactive, we love the One Step Checkout extension, and we have found that many of the popular themes on the market today will not style the One Step Checkout.