Revenue is the life blood of a business and is a critical measure of value. To start, you only need an estimate of the last 12 months of revenue.
The rate your company is growing is another important factor in determining the value of a business. Companies with a higher rate of revenue growth are more valuable than companies that are earning less than the year before.
The industry a business participates in also influences value. One important factor is the potential for future industry growth. For example, a technology company has greater growth potential than a manufacturing company.
When you want to learn more about selling your company, talk to one of these folks first.