I would like to find out how much my e-commerce business is worth
through a reputable company - somebody whose valuation opinion will
mean something in the business world.  Can you give me three names and
website addresses of companies who are reputable, and cite the sources
you found to prove their reliability? The companies you find must be
willing and able to value a business with annual sales under $10
million.

I just went through the same process with my company.  After searching
long and hard, I hired The Potomac Company in Philadelphia.  The guys
who did the valuation for us were former investment bankers from frank
quattrone's technology group in Silicon Valley and now run Potomac's
Tech valuation group - I went with them because we were getting ready
to sell the company and we wanted to hire a firm that had some clout
in the industry.  While the valuation came in lower than i would have
liked, it went a long way when we were negotiating with the company
that ultimately bought us.  The firm's website is:

http://www.potomaccompany.com/

or it's this:

 <a href="http://www.thepotomaccompany.com/">The Potomac Company</a>