Don't ever give money to an SEO firm that "guarantees" first page placement. It is impossible to guarantee such a thing and it is written over and over to never go with a firm that promises such:
http://www.seroundtable.com/sketchy-seo-company-google-12786...
http://www.websightdesign.com/services/search-engine-optimiz...
I used his services three months ago to rank my website for "outsourcing pros and cons". It still ranks high.
The reason why he guarantees the result is because he knows how to analyze the competition on the keyword you give him. He won't accept a keyword that is too competitive.
And in the unlikely situation where he wouldn't deliver, my website protects because he won't receive your payment unless he delivers.
I'll contact Marius now, $200 as a 1 time fee and $30/month is a massive savings over what I thought I had to pay.