I need the best one - even for large volumes - to make sure I'll not end up loosing money by getting scammed..
Many thanks for your help!
I can suggest to you is to choose the big 3 from this link
https://bitcointalk.org/index.php?topic=855778.0So that you are far from scammers. Also the following list of escrow are great..
beware for any unknown escrow service they are scam just like master-p good luck i hope all will be fine..