If price is your only consideration, you’d probably head out and buy the cheapest vacuum there is. It might barely pick up dust and break down every time you use it, but it would be the cheapest nonetheless.
Of course, there’s more to it. You probably don’t want to repair or replace your vacuum very often, so reliability may come into play. And you’ll want something that works so your home doesn’t look like it hasn’t been vacuumed in eight months.
So you might want to consider vacuums that aren’t the cheapest, but provide the qualities you’re looking for. One type you might have heard about is a central vacuum system. Why consider buying one?