If you are looking for Seo services and you are a small / medium business , please check this link : http://www.seocompany21.com/local-seo/ . SeoCompany21.com is providing local seo services for customers in the US.
Great SeoMoz post :
Near the end of December 2011, we ran a survey on this blog asking consultants and agencies of all sizes and geographies to contribute their pricing models and cost structures. http://www.seocompany21.com/seo-prices/