OTC price would offer much lower than the exchanges.
This must really be a scam. If your client have that much of money he'd best contact a real people who knew how things work. 100,000 BTC to be bought by someone would surely spark a flare of alert when sending it to a wallet. Tim really has a good point.
A client is trusting you to buy $882,501,000 worth of Bitcoin, and you don't know where to start? Seems legit
Exactly what I thought, I can’t even be bothered to neg trust his account because it’s so obvious that it’s a scam

About as subtle as a brick through a window!
A client is trusting you to buy $882,501,000 worth of Bitcoin, and you don't know where to start? Seems legit
This is also very suspicious to me. To those that will make a deal to this person, not only use escrow but look for other proofs. First post, and asking this kind of business dealings?
I quoted few from the insensitive comments. I must say this, that my request doesn't look regular doesn't make it scam or illegal, y'all need to relax cos I didn't ask for anyone's private keys. I am new here because I came directly from bitcoin.org in quest for how best and fast we could find private sellers who might want to sell off.