T.H.
I agree not to confront them. I'd be seething as well, probably mostly for the message it sent to my kid, but I think you should just let it go. Anything else you wish to gift to someone (those people or not) you might want to approach them first and say hey we have an X that we are planning on selling, but if you can use it you are welcome to it. This way it gives people a chance to say yes or no thanks and no hard feelings!