It actually surprising that, anyone would hope or think that somehow, they would find someone available to transact such a huge volume this way. Besides, what's stopping you @OP from buying with an exchange or perhaps, buy from sites like buy.bitcoin.com. Oh I get, your a middle man and as such, you wish or hope to act as an escrow to this transaction with hope of getting some percentage from the trade. Good enough, you've got zero reputation and hope anyone would be willing to deal with you with as low as 0.000001sat. You cant get that from this forum man, those who has the sort of volume your requesting definitely knows better than to deal this way.