I've been looking into an antenna also but the success of them depends on how far you are from the broadcast signal and how clear a path that signal has to your location. I did find some that had a 50 mile range. Check for this on Amazon.
If you live were you have large hills between you and the broadcast signal you may not be able to use it. If you google antenna range map you'll get a list of links to various maps. Below is one I found:
https://www.antennaweb.org/Address
I would think if you got one and it didn't work you could return it.