@Topsu thank you for the info 
But I never buyed anything to BITMAIN, and my price is the same in group order or individual buy order.
I supose if you buy one by oneto BITMAIN, you get a discount. you are a good customer of BITMAIN and they take attentions with you : ) I'm glad to hear that.
I prefer buy all my units in one time and not spend time to buy, to pick up, to pay taxes, etc every single day.
I want to clarify that I have been involved in the last group buy of S2 units of the forum and the OP said:
I do not want to switch S2 for Chinese products.
He explain to me by PM the reasons:
And then, I chose for SP30 and after speaking with RoadStress & Spondoolies-Tech.
I hope I have clarified this point finally.
Now let's focus on the purchase of SP30
But I never buyed anything to BITMAIN, and my price is the same in group order or individual buy order. I supose if you buy one by oneto BITMAIN, you get a discount. you are a good customer of BITMAIN and they take attentions with you : ) I'm glad to hear that.
I prefer buy all my units in one time and not spend time to buy, to pick up, to pay taxes, etc every single day.
I want to clarify that I have been involved in the last group buy of S2 units of the forum and the OP said:
Just an update.
Although I was not able to get discounts on S2s, I have been given the OK by Mr Lee from Lee Group to price Dragon 1T miners at a nice price.
[...]
Although I was not able to get discounts on S2s, I have been given the OK by Mr Lee from Lee Group to price Dragon 1T miners at a nice price.
[...]
I do not want to switch S2 for Chinese products.
He explain to me by PM the reasons:
Quote
With that said, it looks like the Bitmain S2 Group Buy may not work out since Bitmain doesn't want to give us a discount on our large order. It's unfortunate but I will now continue to look for another manufacturer for us all.
And then, I chose for SP30 and after speaking with RoadStress & Spondoolies-Tech.
I hope I have clarified this point finally.
Now let's focus on the purchase of SP30