When you have redundant hens all you can do is give them the best chance. The idea of selling them for £2 each is that probably anyone who pays is going to look after them. But you can't ever tell. I did give away a load in desperation once as they were mad egg eaters. A guy picked them up within an hour and said he was going to raise them in his garden. From the smell of spice in his van, I suspect he had a takeaway. But no matter, good luck to him.
At the end of the day there are just too many hens out there as we all want as many eggs as we want so they have to go somewhere.