The most costly aluminum flagpoles can be hundreds of thousands of pounds, especially for some of the more impressive poles. A commercial aluminum eighty-foot pole, which is at the top end of the typical spectrum, might be $10,000. Residential poles that are shorter and more affordable are more practical.
Flagpoles can be purchased as kits with all hardware. For example, a 15-foot aluminum residential flagpole with an external-halyard system would cost $500. It would likely include a flag, a ball or “finial”, a pulley or “truck assembly”, cleats (the handles that hold the flag in place), rope or “halyard”, snap hooks to prevent it from banging against the pole, and a flash collar to give the base a finished look. There are also easy-to-follow assembly instructions.
Due to the longer assembly time, internal halyard systems can be more expensive. Fiberglass flagpoles can be a little more expensive than aluminum because they have less wear and tear. Bronze is more in demand, making it even more costly. Steel tends be the most expensive because it is virtually invincible. There are many flagpole sellers to choose from. One way to find one is to look up flagpoles in your local yellow page or do an internet search.