Oh my gosh. If I were your friend I woulda punched you square in the throat. You don't trade a 92FS, much less an Inox, for a Block!!!
Did you give him the opportunity to buy it from you? If I were with my friend doing that I woulda charged it and figured out some way to explain/make it up to the wife.
Don't get me wrong, I have and love my XD9. My brother has an XDm9 and my other brother has an FNP9, I love all those plastic guns. But, I would not trade a 92 for any of them, not even the hammer fired FNP.
Well.... Good luck I guess. Hope traders (or maybe traitors) remorse does not hit you too hard (though you deserve it).