https://www.blockchain.com/btc/address/13onqzPnGzazarbReooW4sBkqEgKPoMwZV
This is without a doubt the worst service I ever received from an escrow.
I know that's the address; but the only thing we can see there is that it was emptied in 2017. I think I recall zarzarb saying he used that address for different escrow deals/trades, so that could explain the volume of transactions.
Why did he move the funds? Only he can answer that, but it could be something as simple as a change from a desktop wallet to a hardware wallet, a firmware update.... I'm not saying he didn't use the funds for his own benefit, I'm just pointing out that there is nothing suggesting that, at least based on my criteria
It is standard practice to create a new bitcoin address for a new escrow agreement.
If the escrow agent wants to change the address, he can do so by updating the new address in the thread and signing it with his PGP key.
The escrow should try to reach out to the recipient. I have received zero private messages from zazark in my lifetime.
I mean it when I say this is the worst service I ever received from an escrow.