I did a parts trade with a guy who decided he wanted to go back to WPC back box speakers from aftermarket kits.
Apparently the amplifier in STTNG doesn't work well with aftermarket speakers (?). I think it's something to do with the amp's power output (?).
Anyways he really wanted to go back on his STTNG.
I personally like aftermarket speakers myself.
Other than that one instance nobody seems to want them.
There are websites that have ideas for repurposing them, but removing the magnets seems a bit much unless you are handy with power tools.
Magnetic tool holders seemed like a good use.
I sadly ended up taking them to our special e-waste facility so they at least wouldn't pollute the environment as much