Heya, I'm trying to develop a tool to estimate how much a link on a webpage is worth. For example the tool would be able to try and estimate how much a single link on the DP homepage should cost per month... I'm thinking of basing the calculations on the following: Pagerank Link Popularity Alexa Rank (As a small factor in the calculations if below a certain threshold) # of external links on the page Is there any critical factors I've missed? Also I'd like you guys to give me an estimate of how much a link on sites of the following calibre would be worth in your opinion: Website #1 PR 1 Link Popularity of of 100 (Total from Google, MSN and Yahoo) Alexa Rank 2,000,000 5 External links Website #2 PR 1 Link Popularity of of 100 (Total from Google, MSN and Yahoo) Alexa Rank 2,000,000 20 External links Website #3 PR 1 Link Popularity of of 500 (Total from Google, MSN and Yahoo) Alexa Rank 2,000,000 5 External links Website #4 PR 4 Link Popularity of of 1000 (Total from Google, MSN and Yahoo) Alexa Rank 500,000 5 External links Website #5 PR 4 Link Popularity of of 1000 (Total from Google, MSN and Yahoo) Alexa Rank 50,000 5 External links Website #6 PR 6 Link Popularity of of 5,000 (Total from Google, MSN and Yahoo) Alexa Rank 30,000 5 External links Thanks Hodge