My son lost a tooth yesterday.
He is currently saving for a Nintendo DS
He had decided that $50.00 was a fair price in exchange for his used tooth from the tooth fairy.
I suggested that this may be well above the choke price for second-hand teeth and as the tooth was really unremarkable he really is in a price taker situation.
This morning he found a new tooth brush and $3.00 under his pillow.
It was suggested that if he was unhappy with this price he should leave the toothbrush and money out so the tooth Fairy can return his tooth and take bab the toothbrush and the money.
It was decided that money was a much better medium of exchange than second-hand teeth.
Also the band has been restricting things nicely at present.