You are correct! You can buy two way radios off the web cheaper, but at what cost?
To find out, let's compare buying off the web vs. buying from a radio shop, by walking through what typically happens in this situation. Let’s say there is a business—doesn’t matter what kind of business, it could be public safety, it could be manufacturing, and it could be education or hospitality. One of the employees at this business is designated to purchase some new two way radios to improve communication efforts. As with any good mandate, the employee starts to educate themselves on what a radio system is and what it can do for the company. This person becomes known as the official “expert” at the company. It may be the person already responsible for technology and technical aspects of the business or it may be a new role added to their job that's very unfamiliar to that person. (Warning: Either way, by educating only one person, it leaves the company vulnerable if/when that person leaves!)

