I wouldn't sell my account for 100BTC even... How someone could screw over the community after trying to help it is beyond me. If the account was sold or not doesn't really matter...the original Master-p is responsible in my opinion.
That's exactly how i think too. If someone can do such a thing and sleep well with it, i don't get it. You have to know what will happen and you betray a lot of people then.
A shortage of money is no excusion. He could have scam himself too and earn more so it might be he thought there is no risk but i REALLY can't imagine this. Especially escrows are trained, for their own good, in finding potential scams. He not realizing what could happen is beyond possible. So at this point it sounds like an excuse.
Can it be that he screwed up and lost his wallet without having it backed up? This could explain the unmoved coins. Still, for someone providing escrow being so careless would not be ok.
From every angle i look at, it sounds like an excuse. Or can the staff confirm a noticeable change around the time of claimed sale of account?