Price discrimination
brk: My assumption is that this method is used to get as much as possible off big companiesI think that your assumption is grossly inaccurate, and you should probably put some effort into basic sales and marketing concepts.I will tell you that 9 times out of 10, when you think a corporation is trying to exploit some nefarious tactic to rip off some or all of their clients, that the reality is simply that you don't understand the process or are missing some key data point.  IE: corporations are not all dark and evil.  It's important to understand this and grasp it.  Presumably you (the generic you) would like your venture to become large and sustainable and "big" someday.Anyway, others in this thread have done a good job explaining some of the concepts of value-based selling and other reasons why for some products it is impractical to have a one size fits all pricing model.To answer your question, though, one of the benefits of no price tag is that if you were to publish a median price, you might scare off some of your small or large clients from calling up.  They would either think the product is too expensive and complex, or too simple and limited for their needs, when in reality neither is true.  By talking with a sales agent a price that is fair and accurate for that customer can be established.