I think they're breaking them down, removing the ASIC chips and selling them off individually for bitaxes.

A good way to actually check would be to look at Marathon Holdings churn rate; I remember a few months the CEO speaking about that in one of their conference calls.

Though, I think they still phase it off to "free energy" systems (solar/wind powered) thus I don't think the market actually sees an influx of lower models, meaning that the price of the units are probably still holding value