Real Graphic Design isn't cheap. Identity design from a SF studio can run you into the thousands. $10k, easily. (If you're a big corporation, add one or two orders of magnitude to the bill.)

Now of course you can find stock and spec work on sites like 99designs—but that isn't real design. Rather, I consider it an affront to the profession. It will give you the same quality of work that outsourcing development to indian or russian kids for $5 an hour would get you.

EDIT: I wonder why I'm being downvoted for this. I know it's unpopular to elevate design, but it makes a huge difference. And after spending 4+ years of our life and $200k at design school to master the craft, I think designer's true worth and skill deserve some recognition.