I have a Fairphone 1 to give away. It needs a new motherboard as the on off botton does not work any more. I will remove the motherboard before sending because of the personal data that I cannot remove any more. And I can’t garantee that the battery still works good as I didn’t use the phone for about 1 year. The sending costs has to carry the receiver.
Update: Sorry Kevin for replying too late. The Post is not activated any more due to my late answer. I found out that it is not so easy to send a smartphone in other countrys for security reasons. The most postal service provider do not allow it and it I find a provider it will probably be expensive. The problem is the battery. But removing the battery is not enough as the people controlling can not look inside. So i think sending it to the UK won’t work out.