I was selling a Crossroads frame to a fixie guy, and the buyer indicated his Mom was coming to pick it up. It was already paid for via PayPal, and I had it in my living room. Also in my living room is another bike I'm building as well as a bike I'm stripping parts from. Bike parts everywhere.
So the Mom shows up, I invite her in and offer to carry the frame to her car. She asks where the rest of the bike is, and I explain the other parts will be used or sold. As an example I tell her the wheels from the Crossoads are being used for the bike I'm building. This is the response: "But those parts belong to this bike! That's not right!" and begins crying.
Fortunately my gf was there and took the lady outside to talk her down, while I called her son and explained what had transpired. She came back and took the frame, but not before giving me a dirty look like I was an organ thief.