input: [Benefits?] Fairly cheap. IF it works you get a good return. But that is a big IF...as it usually does not! [Risks?] If an SEO is good at marketing there is no reason for them to price their services this low. Effective SEOs that know business can easily make 6 or 7 figures a year from setting up affiliate sites, AdSense websites, and/or building businesses around their skills. Many of the people which do services in this price range take the client's money and disappear. There is a market for lemons effect at the lower end of the market. And people get what they pay for. If they are able to rank your site for limited capital there is a good risk that they are employing high risk techniques, which may eventually end up destroying your rankings. [Service] 
output: Low End SEO Provider
options: S E O B o o k M e m b e r s h i p
options: G o o g l e A d W o r d s
options: A v e r a g e S E O P r o v i d e r
options: L o w E n d S E O P r o v i d e r
options: S E O C o n f e r e n c e s
options: H i r i n g a S E O M a n a g e r
options: O t h e r S E O T r a i n i n g S e r v i c e s