E-Book Covers and fomatting needed

I am in need of a freelancer to format and design e-book covers(also will be hard cover) for 4 courses for me. The courses have already been written, so i only need someone to make it look professional in PDF format. My budget for this project is $150, any bids over this will not be considered. The successful applicant should have done similar formatting projects before, freelancers who can show me similar examples of past work will be highly regarded.