No. You aren't always an expert about things you buy. You should not then start to rely on the price as a proof of quality. If something is expensive it is either good quality or you have a greedy seller. To catch the greedy seller you need to understand what you buy. This is not always possible. Therefore: always buy the cheapest you can get if you aren't an expert or just don't buy.
The government has the task to know what it procures and also should have the resources for the task. However a single person doesn't always. Even for the government it is difficult. We all know stories about government being fleeced by providers.
You also have to know how to take care of them. Which requires work or paying folks. Even then the people who maintain it for you will give you instructions so it's still more work than t-shirt of the week
"This shirt's dry clean only, which means it's dirty" -Mitch