I have a neighbour who is in his 70s and his 30 year old fridge recently packed up. He doesn't want to buy a new one as he is against spending lots of money on something that will last longer than he will.
I have been scouring ebay, Gumtree and Freecycle but thought it might be worth asking here. He can pay up to £50. He wants one that is about 22 inches wide and 47 inches high. He would need it delivered as well unless it is close to Ipsden Buildings then someone will probably be able to collect it.
Might be worth checking out the British Heart Foundation's Furniture and Electrical store on the Old Kent Road. They 'recycle' unwanted kitchen appliances (they took my old (but still in excellent working order) cooker, for example).
Hope you manage to find something suitable.