Wow! This is so complete, satisfying and believable. This somewhat offhanded and casual couple seem right for each other. I especially like the idea of Severus, the misanthropic introvert, at last able to hide away and work without being bothered. Very suitable for him. Oh, and how he grows into being worthy of Ollivander, yes, that's very good, too. Your story is tied so nicely to the larger plot, it adds credibility; I believe this as a behind-the-scenes to the books. All the small details -- the individual wands, the conversations in the front of the store -- add to the feeling of realism and speak of the work you must have put into this.