I can’t say about onpage optimization. But offpage optimization (link building) is very good here, you can check the prices http://www.profitlinking.com/packages-and-prices.htm It is supported by a solution that automates many routine jobs and only the picking is handled manually, this is how the price is cut.

I would love to say I am, but who knows? With thousands of companies, there is no way to really know? Every site has different needs and every company changes different prices.