As I am only prepared to allocate a modest budget for my hobby, I try hard to avoid buying a coin just to “tick a box” or that is a low grade rare date or that is not visually appealing (either design or condition). This is precisely because if I do buy such a coin, I won’t get a big buzz or that “radiance feeling” as you put it. (Personally, I find it difficult to get excited with this QEII halfcrown design, no matter how rare the variety might be.)
On a different note, I hope you will soon resolve this issue with the dealer.