It is natural to not trust some random guy word that he would pay me 90btc to unlock his account, same as he don't trust me I can help him to get unlocked.
The most normal thing is to use escrow so no one can do anything wrong right?
The thing is actually very simple, if we start from the assumption that the OP has more than 100 BTC (supposedly 600 BTC) currently locked to the exchange and that you offer to help him solve the problem within 72 hours provided he sends the fee to escrow. The question is how the OP will pay 90 BTC to escrow if his funds are frozen and that's all he has?
The second question refers to why the offer is only valid "next few hours", and how it is possible to unlock (mediate in unlocking the account) without knowing any information about that account owner?
And yeah, my offer still stands next few hours.
I can manage to unlock your account without need of any private information off you and you can pay me AFTER your account get locked.