Can I purchase a computer from a big box store?

Why do I have to purchase a computer, tablet, printer, etc. through a Purdue approved vendor when I can get what I need for less through an online retailer or a big box store?

While the initial purchase price of IT equipment through online vendors or big box stores is often less, the total cost of ownership is higher.  The low cost items are consumer grade models designed for light home use.  The business class equipment we purchase is superior in terms of durability and stability. Our units are designed for corporate clients, governments, etc.