Prism99

Since they both take .9mm leads, the pencils themselves are probably the same. The Amazon one comes with 10 white refills; the Nancy's pencil comes with 10 white and 10 graphite refills. If you add a refill to the Amazon order, it may still come out as a better price than Nancy's.

Edit: You can also look for other brands of mechanical pencil that use .9mm leads and probably save some money. I don't think there's anything special about the Fons pencil except their styling and brand name.