Don't think any escrow would get up to 100 btc held at once. Maybe to escrow one big trade, but that wouldn't be a good one to steal because 1 person stealing 100 btc from 1 person is the easiest way to have someone seek retribution, help from the authorities, lawsuit, whatever.
Uh, this is an old one. But it is 115 BTC.
https://blockchain.info/address/1Dabso5tsVpM9oZKxu8h4WYUUxjkwxC25QI think Gleb almost sent me 3k BTC, but it never happened.
I'm pretty sure I sent you about that, but would have to check. Search this site using the Gleb account + Dabs. I'll do it later when I'm finished with the post about if you have trouble finding it.