It's a sign of the 'perfect storm' times....
less interest in ICE cars, fewer buyers, ageing and declining group of owners, failure to attract younger/new buyers, MMC's change of direction and misreading of the market.
The CX is a bargain, however, when there's no demand the market decides what things are worth. Super 3's are plummeting in price as well, but then no one seems to want a used Plus 6 either.
If you happen to be in the market for one..... and you are very much in the minority, there's chance to pick up a bargain. BUT....... you'd have to be fully aware of the fact that your purchase will keep losing money, the days of rock solid residuals are long gone.