I do not support or encourage the use of crowd-sourcing services. They do not provide the best outcome for you (the clieet) as it pertains to focusing on your individual needs, building relationships and most importantly: bringing you (the client) closer to a truly professional and skilled designer. Crowd-sourcing often (if not always) pays many of the candidates $0. This is Spec Work which I 100% do not support. Alternatively, you can look for and work with an experienced and reputable designer who is familiar with graphic and website design, user experience, user interface design and has a portfolio you like and jives with what you need. You can look on places like Behance, Coroflot, or Creative Hotlist and search for folks you like. These are known creative portals that will help you narrow down your search to creative professionals that know what they are doing. If you are looking for a quality end product that will grow with your business, then it's worth it to pay a little more now to make sure it gets done right.