A good rule of thumb for determining your site’s worth is:
Your site’s monthly revenue x 12 months = Potential sale price
In other words, whatever revenue your site might earn in 1 year’s time — that’s typically the price many industry players would be happy to pay.
Read more here:
E-REAL ESTATE PART 1 – THE VALUE OF YOUR WEB PROPERTY
E-REAL ESTATE PART 2 – SELLING WEBSITES