I do. In my mind passing things on for free is part of a social contract, and it's generally highly participated in in my area. Lots of people do it and it's beneficial both financially and environmentally, and encourages a sense of community.
When someone comes along and breaks that social contract it's galling, and leaves people feeling cheated. I've seen people ruled out of future free things as a consequence.
I especially judge if I've passed a item onto a friend for free because they asked for it or expressed a significant interest, and then they sell it shortly afterwards. So cheeky, and the actions of someone who's a soon-to-be ex-friend.
Similarly, when you lend someone something with explicit instructions to return it and they then sell it. Cheeky fuckers.