Often there are three purposes why anyone would publish a brochure: to sell or market, to educate, or simply to entertain. You must pinpoint what it is that you are trying to achieve out of having that printed material created and sent out to your target audience. Companies will often prominently list their no-frills prices to attract customers looking for bargains.
The prices will usually include a few standard paper choices, full color and a standard fold, and shipping (sometimes this is free). If you are sure of what you want and you don’t need any consultation or custom work, your cost will remain very reasonable.