ThinkGeek offers this Pizza Pi Cutter in Red or Lime for $9.99. With around $5 for shipping, that's $3 under our February mention and the lowest total price we could find for a Pi-shaped pizza cutter. It features two stainless steel blades.
Zyliss 72476 Pizza Slicer - 54067724768, a similar product, is available at these stores
Brand: House Brand