I have 4 cameras right now, never got rid of my others when I get new ones. My hubby knows never ever to give away any of my cameras without asking first. However with other things my hubby frequently does stuff like that.

I think as far as hubby's are concerned (no offence to any hubby's on PT) is that if they want something new and get it, they don't have any reason to keep the old one so they don't think that anyone else would mind either.

I think something like this should be discussed, calmly, with your hubby and if your BIL already has the camera I'd make your hubby be the one to go pick it up from him and have to explain his mistake to him. JMHO