While your cover is the most important part of your book, the interior is the second. Here's what you can expect at each price level.
I've always found checklists handy, and this one for self-publishing is no exception. If you think I've left something out, let me know so I can add it. Feel free to print this and share with my business name on it. Most important (and do this before you pay anyone to do any work on your book or you'll waste a lot of money)