Hi. I am Alex's client.

Though I don't usually get involved in conversations here, I do want to say that I've been using the service for approximately 2 years,
tried multiple cards & everything worked as expected.
Whenever I faced problems, Alex made the necessary arrangements in order to solve them.

Though it looks like the above case is somewhat irregular, the suggested deal seems fair to me (that is - using an escrow for a limited & agreed on amount of time).
But, by all means, I'll let the parties decide what's best for them.