Update: The citrus knife's price has gone up, but the Kai Pure Komachi 2 Series Tomato/Cheese Knife (AB2204) is still $3.95 with free shipping on $25+ or with Prime.

Amazon has the Kai Pure Komachi 2 Series Citrus Knife with Sheath (AB1277) for $3.95 with free shipping on $25+ or with Prime.

Kai Pure Komachi 2 Series Tomato/Cheese Knife (AB2204) for $3.95 with free shipping on $25+ or with Prime