As I suffer from Eczema from childhood, I have been using Sulphur based soaps to ease the itching. I came across this which boasts a 10% sulphur content and also quite a large bar at 200G.
States it is long lasting so hopefully worth it for the £6.99. This was the cheapest I could find online.
If anyone can recommend anything better or at a cheaper price, please do state in the comments.