How can I figure out the pricing of our competition?

Hi, I have a startup and I need to figure out the price of our competition. Most competing companies have a revenue based model and to figure out the pricing one has to call and provide all details of sales, revenue model... A couple of things that I am thinking to do are: (1) have a fake identity and business and call to figure out pricing, (2) hire someone in freelance.com to do it for me. Two questions follows: 1) is it ilegal to fake an identity for this purpose? 2) Is it illegal to hire someone to figure out the pricing of competition? I do not want to know the method he/she uses. 3) Any other idea on how to do it? Thanks