(True incident: I once wanted two infra red movement detectors for a burglar alarm. Went to B&Q and they were £9.95 each or a twin pack (identical model) cost £29.99. I kid you not. I even queried a sales assistant who verified the displayed prices were correct).
Has a habit of collecting toilet seats once they're broken or out of use - so far he has collected approximately 46 of them in various colours and shapes.