Growing up

So, Sidney is growing up and didn't even consult me about it! She's got her nerve...
I've noticed lately that Sidney has one tooth on the bottom that has been on the move. I only noticed since Sidney's teeth are beautifully even spaced and now she's got one trying to make a break from all the rest. Yesterday I told her to open her mouth so I could check them. Guess what I found? She has a big tooth coming in already right behind the moving tooth! I was so shocked, I gasped. I probably scared her until I explained what I saw. (really I gasped because the cost of orthodontics flashed right before my eyes). I felt the tooth on the move (bottom front) and yep, it's loose. She's so excited and already talking about the Tooth Fairy. Can't we get through Christmas first? Sophia keeps checking her teeth and is very disappointed that none of her teeth are loose. What's the going rate for the Tooth Fairy these days?