We have come to an agreement amongst ourselves. 150$ refund ($60 now) and the rest at a later date, along with all information pertinent to the account. I already opened and closed a case for the 350$ waiting for payments to do the other half.
I can confirm this. My responsibility here is now voided (according to our deal). He has received one payment, and have been handed every tool neccessary to recover the account on his own.