The worst thing that could happen is if you went through this & got what you paid for as promised. You would then at some point think you could do it again on AG and/or in life in some other way.
What you're doing here (& this is an excellent analogy) is playing Russian roulette with at least 2 bullets in the revolver. Even if the odds are slightly on your side (by no means a given in this instance) it's an undeniably stupid chance to take. As humans, our ability to rationalize is exponentially greater than any other life form. If you wish to do so to justify going forward with this & it doesn't work, you'll objectively see - you should've seen it. If it does, you'll rationalize it was somehow the right thing to do & keep pointing this kind of gun to your head in other places & ways in life, not just AG. Your critical thinking abilities will just get flushed down the toilet & in insidious ways. The gun's going to go off & that's a guarantee. A matter of when - not if. You'll look stupid then because that's undeniably how you acted with considerable forethought.
Call him on his escrow proclamation & report him if he refuses. You'll then protect yourself & so many others simultaneously. That's as moral as it is intelligent.