Thank you for the info! I am on Ebay almost 24/7, I ask questions several different ways before buying, some of the sellers will tell you anything but the correct time of day and the truth regardless of their ratings.
I too use eBay after paying $200 each for new EBC rotors.
Last rotor I got was $35.
If I can't see that it is perfectly flat and unworn, then I skip it. I have enough worn out and cupped rotors already.