Currently i'm looking a seo service/partner to help me in this field . I received several offers but i'm not sure about their price is true or not . So please help me decide also find a good SEO service 
for monthly maintenance ( offpageSEO/link building )
They're charging about 500$/month
for monthly maintenance ( offpageSEO/link building )They're charging about 500$/month
Code:
Baseline SEO Report
Competitor Analysis Report
Keyword Research, Analysis & Review
Implement the Google Analytical Code
Base line Keyword Ranking Report
Optimize Search Engine Friendly (SEF) URL
Validating the Website code via W3C Tools
Submission in 88+ Google Datacenters & Free Search Engines
Submission in ODP(dmoz.org)
Submission to 900 Search Engine Friendly Directories
Inclusion in Alexa
List the website in Google Base & Google Product Search(Only Product Sites)
Keyword Ranking Report (Monthly basis)
Traffic Analysis Report(Monthly basis)
Addition of Link buiding Section
One Way Link Building Service
Improved Keywords Density & Prominence
Improved Keyword Saturation
Press Release Section in the Website
Submit Press Release into 150+ PR Network Websites
Participation in Discussion Forums
Optimize RSS feeds
Submitting Articles to 500 Articles/Content Directories
E-Mail Marketing