I just started my own SEO service and launched a WSO on Warrior Forum and got a great response... I started the service off with reviews copies for $15 a keyword and now the service review copies are $99 a keyword with guarantee ranking in TOP 15 or money back... I only do the service if the URL and Keywords are indexed and not wayyyy too competitive.. If they do want highly competitive i raise the price but to how much?? I am planning on moving the price up to $149 a keyword with a monthly price of $20 to keep the website ranked for that keyword.. Is that a good price or should I charge more?? What do you guys think??