So KnC thinks a Batch1 customer can easily make up the $3k difference in one month and stay happy with 75% performance of a Batch2? 

And will I get their used ones from their own mining rigs or a new one? 

Bogus. 

To new miners:  Screw buying centralized 3rd party mining equipment.  You'll always just be a sucker and their source for free money.