This is a neighbourhood social media chat. Everyone lives in the same avenue or in streets off of it. Typically messages of cats going missing/does anyone know a plumber etc. The main types of messages are people giving away items for neighbours to pick up.
Person A advertised an item on the chat that was a piece of gardening equipment.
Person B said they would have it and item was left out for them to collect and they do so.
Later on Person A sees item has been returned to their front garden. When asked, B explains they took item and tried it, but it did not work for the thing they needed, so they returned it.
Who is the owner of the item?