You can definitely get the hardware for <$15 in bulk if you source it yourself. There's a huge variation in quality though, as with most of the China stuff. If you're willing to deal with the caveats&lock-in of the Gimbal Beacons you can get those for $5.
Feel free to hit me with beacon questions, I've got a bunch of varieties sitting on my desk right now.
Feel free to hit me with beacon questions, I've got a bunch of varieties sitting on my desk right now.