As far as purchasing blades in quantities of 100...I don't know.
I first purchased 100 Voskhods when I started DE shaving and I don't remember having bad experiences with them. And I bought them because of their price.
Just recently, I bought another 100 Voskhods. And...man!
It's like between that 1st 100 and the 2nd 100 my facial hair went from the kind of stubble you might see on Legolas the Elf to the stubble of Lee Marvin from "The Dirty Dozen". Tough, grey stubble. Stubble that had "seen the elephant". Stubble that had shot a man in Memphis, just to see him die.
And all of a sudden, shaving with the Voskhods was like The Spanish Inquisition.
The gear stays the same. Most times, it's you that changes!
This is the high quality content I come here for