Nice coins in all of the pictures here. Just a quick observation, the top left lion is not as good as the others on all of those coins. Has anybody got a 1923 halfcrown where it is struck up properly? It seems like there might have been a striking issue.
I like copper pennies, but i did not start collecting them until about 3 or 4 years ago. I have some bronze pennies, but i don't collect them as much as the coppers.
This is a very interesting subject. I would say that the buyer should pay Richard, as he got a refund when the coin did not turn up. He now has the coin and has effectively not paid for it.