Garden water feature (Aspley NG8)

L53cm Stoneywall cascading rock effect water feature by Ambiente. Has been in garden for four years, so needs a good wash, but no damage as far as I'm aware. THIS HAS TO BE PLUGGED INTO AN OUTDOOR POWER SOCKET (not solar). Plug and pump have been stored in shed. I presume they work, but can't guarantee as they have never been used. See photo 3. Must be collected within a couple of days of being offered to you.