Desert Throwing Knife

Desert Throwing-Knife: A desert throwing-knife is unwieldy for melee combat. Even if you are proficient with this weapon, you take a –2 penalty on attack rolls and damage rolls when using it in melee.
Exotic Ranged Weapon
Cost: 3 gp
Dmg (S) 1d4 Dmg (M) 1d6 Dmg (L) 1d8
Critical: 19-20/x2
Range Increment: 15ft.
Weight: 1 lb
Damage Type: Piercing

Source: Sandstorm