There are a lot of good plans for DIY antennas on the web that you can make for less than $10 worth of parts, which is good considering the flood of $50 antennas on the market that are little more than hype.
A couple of years ago I made a Gray-Hoverman antenna. I had no complaints about how it worked, but it wasn’t very durable. And in St. Louis it was overkill–it picked up everything tvfool.com said I could get indoors and nothing more. No SIUC PBS station for me. A Gray-Hoverman is probably more useful along the eastern seaboard where the cities and TV stations are closer together.
Rather than fix the Gray-Howerman yet again, or build something else, I bought a basic, traditional-looking RCA ANT111F for $6. Even the simplest DIY antenna, made primarily of a cardboard box with aluminum foil, costs $3-$4 in materials to make and my time is worth more than the difference. If my kids were a bit older, a DIY antenna would be a great science experiment to do with them, but they aren’t.
I did find my reception in the basement, below ground level, was pretty abysmal. The range seemed to be less than five miles, and I could only get about five channels. But on the first floor, with the antenna about seven feet above ground level, my range is 10-12 miles, depending on the strength of the distant signal, and I could get 30 channels. To improve reception in the basement, I connected a longer cable to the antenna (using a cheap keystone jack as a coupler) so I could put it up in the ceiling, closer to ground level. When I did that, I could get 24 channels, though the signal strength wasn’t all that good.
One thing to remember when changing or repositioning an antenna: always scan for new channels afterward.