If I remeber correctly I used to get a quarter for a tooth, and I thought that was great! How about these numbers!  The nationwide average in 2010 was $2.52 per tooth, an 18% increase from a year earlier. That's the word from the annual Tooth Fairy Poll conducted by Delta Dental of Minnesota. Tooth Fairy monetary gifts ranged from one penny to $100. A hundred dollars for the Tooth Fairy! No way! What's your average cost per tooth? Tell us in the comment section.