I don't like tooting my own horn, but...
X Optimizers.
We're not cheap, but if you think it's expensive to hire professionals, wait until you hire amateurs.
We launched at the start of the month, but if you want to see some
SEO success stories (as in, proof that we can do it!), go ahead.
If you find a better source of SEO, let me know: I've yet to find one company that actually gets it right, and after seeing people use text from my copywriting studio go to poor use, I figured I'd have to make my own in order to see SEO for adult done right.
Best of luck, anyway.