OMG THANK YOU for posting that!!!! I'm pretty sure he contacted me wanting to buy my blue fawn pet quality male!!!!
He said her mate got killed and she wouldn't stop quacking. I told him he could buy my male but that wouldn't stop her from quacking as call ducks were bred to quack. He then asked if I would trade him my male for his female. I told him I wouldn't mind doing that, BUT they are sociable animals and they should be in pairs NOT by themselves and I suggested maybe it wasn't the breed for him. The last email was just yesterday morning and I haven't heard anything else!!! Sounds like he got back ahold of you after that!!!
It just disgusts me. They really aren't that noisy when they're happy. At least mine aren't. And she never was either when she was here with others of her own kind to mingle with. My roosters make WAY more noise then my calls do. It's so sad the way some people think and do things.
Update* Just got another email from him and he has let her out onto his property with a pond free ranging. What an idiot. Doubt she'll last long out there by herself. And he wants me to come catch her. Good luck with that.