Currently i'm having good amount of traffic from Google and hoping more visitors in future. i'm just wondering do u people use companies that guarantee search engine results. not from Google only but yahoo as well.

i'm talking about SEO companies that optimize pages and other stuff.

Also I would like to spend no more then 100 USD on this project!

Cheers,

no company can guarantee search results on any keyword. if some body claims that he is fake. and you can find any any company who product good results in $100 you probably need to hire some freelance.