Right now you can get the 12 Pack Oral-B Shiny Clean Soft Toothbrush Set for $9.99 on itechdeals.com. Use the coupon code: TOOTHS to get an additional $4.10 off making it $4.89 + free shipping to your home. That comes to $.58 per toothbrush! You can go here for this deal!
I did a price comparison and this is $29.99 on Staples.com!