How not to be deceived

[uriart]

We all have a certain degree of risk. Well, what then?
Let the buyer finds himself and sells, arranging with interest from the seller and buyer.
And if both sides would be decent (?) People, then get their %%%%!
What else?
Another scenario could be just like this. The seller and the buyer finds himself the mediator is no longer with their services.
What could well be!