....because sooner or later they would turn out not to be profitable already.
Absolutely agree, but unfortunately this is valid for your much more expensive Antminer too!
Of course you can try to sell the Antminer later ... and scam some newbie into giving the expression they can still make money with this ;-)
Many chinese miners are selling off thier hardware now. Many ppl are getting bulk deal.
If you live closer to China, you might hear of this. I probably give it a go, setting the mining is not really that easy anymore.