2 ScubaPro FFM with BuddyPhones

Description

ScubaPro Masks:
The masks are great.  I have two of them, they work fine, no issues at all.  They are comfortable, decent visibility and I've recently replaced the straps on them.  They go for 0 each new.
https://scubapro.johnsonoutdoors.com/masks/full-face
BuddyPhones:
The BuddyPhones DO NOT WORK.  I don't know why.  One will provide some static when you put in a battery, the other two do nothing.  The guy I bought them from told me they worked, they didn't.  I paid significantly more, but I'm not trying to be the jerk.
I bought them because, as a package, it was well worth it, but I'm not keen to pay OTS to try to fix them.  If you're good with electronics, they're likely relatively simple systems and each one goes for 9.
https://www.oceantechnologysystems.com/store/wireless/buddy-phone-through-water-transceivers-1-2-watt-output-power/
You do not have to take the BuddyPhones with the masks, but I'm not lowering the price on the masks without them.  They are just a gimme because I have no need for them without the masks.