esta es una pagina que se basa en tu posicionamiento en google, en buscadores en alexa etc y tambien calcula cuanto ganarias por mes con una pagina de publicidad aca unos ejemplos

Results 
Earnings Report for www.clarin.com 
The following report outlines traffic levels received by the submitted URL, overviews sources of potential income, and proposes a resale value of the site based on these factors. If you believe your site is worth above $500,000, you may be interested in consulting with an expert in internet mergers and acquisitions. 

Alexa Traffic Ranking The site's Alexa Rank = 498 

PageRank The site's Google Page Rank = 7 

Backlink Report 

* Yahoo: 0 
* Altavista: 580000 
* All the Web: 12400 

Average of 20,318 backlinks. 


Your site is valued at: $3,245,953 


Results 
Earnings Report for www.deremate.com 
The following report outlines traffic levels received by the submitted URL, overviews sources of potential income, and proposes a resale value of the site based on these factors. If you believe your site is worth above $500,000, you may be interested in consulting with an expert in internet mergers and acquisitions. 

Alexa Traffic Ranking The site's Alexa Rank = 20,454 

PageRank The site's Google Page Rank = 5 

Backlink Report 

* Yahoo: 0 
* Altavista: 4510 
* All the Web: 266 

Average of 171 backlinks. 


Your site is valued at: $58,434 

Results 
Earnings Report for www.mercadolibre.com 
The following report outlines traffic levels received by the submitted URL, overviews sources of potential income, and proposes a resale value of the site based on these factors. If you believe your site is worth above $500,000, you may be interested in consulting with an expert in internet mergers and acquisitions. 

Alexa Traffic Ranking The site's Alexa Rank = 2,974 

PageRank The site's Google Page Rank = 6 

Backlink Report 

* Yahoo: 0 
* Altavista: 15000 
* All the Web: 574 

Average of 605 backlinks. 


Your site is valued at: $441,850 


la pagina es http://www.cwire.org/website-value-calculator/