This makes absolutely no sense.
So basically you are going to exclude people randomly according to what you consider a "good deal"?
Will you be trashing the entire "group buy" when the final price ends up more than $3800/sp30?
Your estimations are so far from reality why should you decide how many units the group buys? (production costs of an sp30 are probably more than $2000)
Anyways if you do manage to negotiate the price down to $0 per sp30 count me in for 200.
Randomly? OMG...
Have you really thought about that?
Or I have not explained well, or you have misunderstood me.
This is worse than explain that is 'capitalism' in Venezuela...
The group decides (not only I) how many units to buy; based on strong criteria, such as Difficulty or some than I'll explain.
Many buyers have told me (invented numbers for this example):
"if the value is 5000$ I want 1 unit.
if the value is 2500$ I want 2.
if the value is 1000$ I want 5."
Someone has to spend around 5k, but fixed costs are diferente (delivery cost per unit, VAT/taxes, etc).
Due to the amount to units is directly proportional to the final price.
Well, and now value Vs Price:
The final price (value) of any miner is not define by the production cost of the product. The final price (value) of SP-30 is due to the ROI and profitability.
When a miner is not profitable, it stops producing. But the production cost is the same.
Price is the money that you pay for something (albeit junk).
Value is what I'm willing to pay for it (considering the ROI and profiability).
The
value per unit is what I am negotiating.
I hope I explained it right this time : )