Well I usually agree with the Karma thing. But with an ounce of dope gone, that's a totally different story especially the price you paid compared to what I can get them for. I would try to find out who this person is like ask some people that are friends with the people at your house and maybe they'll mention that someone "just" got an ounce. I would then talk to this person to give it back, and if they don't than let right into the bastard like Ali. I'd then part ways with never dealing with this person again, unless they make it up somehow by like sparking you up or something. Yeah man, losing an ounce is not cool.