Pistols are great to get running speed and quick AIDs, Launchers are good to make things explode but the Crossbow and Ballistic knives are the best to show off your skills!
All Secondary Weapons cost 1500 Points after reaching the unlock level or purchase threshold. All weapons unlocked by default require 0 points.
Pistols

ASP
Unlocked: Default

M1911
Unlocked: Default

Makarov
Unlocked: Default

Python
Unlocked: Level 18

CZ75
Unlocked: After buying all other Pistols
Launchers

M72 LAW
Unlocked: Default

RPG
Unlocked: Level 12

Strela-3
Unlocked: Level 30

China Lake
Unlocked: Level 48
Special

Ballistic Knife
Unlocked: Level 15

Crossbow
Unlocked: Level 33