Did I just make a mistake?

Oops. I think I may have just made a big mistake. Someone came to the door and knocked. I didn't get to it in time, but I did see the guy walking away. His work friend noticed me in the window and pointed, at which point the guy came back. Placing the dogs in the lounge, I open the door. What does the guy want? He asked if he could take the oven that has been outside of the house for a few months now. I shrugged and said "Sure.", then I noticed them loading it onto the truck. "Erm...oops.", I think to myself.

I didn't actually realize he was asking to take the oven. Shows how awake I was. I thought he asked "Can we take the scrap metal you have in the corner there?". It's not like we have a need for scrap metal. But, after they'd loaded it on the truck, I realized it wasn't "scrap metal". Hopefully, no-one will care that it's gone. Afterall, it's been there for months. It's not old, but somehow, after being rained on and such, I doubt it would work without some repair from an electronics specialist.