YanquiG, sorry to hear about you getting robbed. Even worse than they objects, they got all your files.
Similar thing happened to me a few years ago. I happened to be in Chile on vacation, but I am sure they were armed when they came by. I am also pretty sure it was an "inside" job, either via the portero or someone who lived in the building.
They stole my, a camera, and a few other things (including a suitcase to carry it all in) but at that time I was in a position to replace almost everything. If that happened now, no way. And, I would pretty much be gone on the next plane out.