Massive amount of work.
No doubt there is $2600 worth of "X" in 5 metric tons of keyboards. Heck, at $50 each, that would only take 52 Model Ms, and we know that they made perfectly good ones Hecho in Mexico.
@ approx 5000+ keyboards @ approx $2 each for a quarter of them, throwing 75% away, you break even
if 10% of them are Model Ms, plus just a little extra, you come out OK
But then, I live thousands of miles away and am out of the running .....