Wolf, I don't know what I'm different to you. I click on the first fan on the Argos page (Challenge, £14.99) and it says:
Collection - currently out of stock at (my local store)
Home Delivery - currently out of stock for home delivery to (my home address)
Buy a cheap fan heater. All of the ones I've ever had allow you to run the fan with the heater turned off and they do an excellent job of cooling a room.