P2000 : the P2000 is the default pistol for CT's (if not the usp-s).
damage
------------------------------------------------------------------------------------------------------------------------------------
HEAD : 140 without helmet and 70 with helmet
CHEST / ARMS : 34 without kevlar and 17 with kevlar
STOMACH : 43 without kevlar and 22 with kevlar
LEGS : 26 with kevlar and 26 without kevlar

price : free

I do not recommend taking it above the USP-S but if you prefer the P2000 it's alright.
It's just easier to play with USP.

===========================================================================
USP-S : It's the alternative for the P2000. It has a detachable silencer. The USP is supreme in accuracy with a more manageable recoil (than the P2000), and it also has the added benefit of a silencer which removes tracers and silences gunfire. The P2000 gets 1 extra bullet in its magazine and over twice the spare ammunition, and it also has the superior accurate range(31>29). The accuracy of the USP decreases if the silencer is removed.

price : free

HEAD : 140 without helmet and 70 with helmet
CHEST / ARMS : 34 without kevlar and 17 with kevlar
STOMACH : 43 without kevlar and 22 with kevlar
LEGS : 26 with kevlar and 26 without kevlar

===========================================================================
P250 : The P250 is the cheapest weapon in CS:GO capable of dealing one-hit headshot kills to helmeted enemies, and it does more damage to armored enemies than the spawn pistols, but it only has two reserve ammo magazines.

Price : $300

HEAD : 151 without helmet and 96 with helmet
CHEST / ARMS : 37 without kevlar and 24 with kevlar
STOMACH : 47 without kevlar and 30 with kevlar
LEGS : 28 with kevlar and 28 without kevlar

===========================================================================
Dual berettas : the Dual Berettas are capable of an incredible rate of fire and large ammo capacity, but they suffer from low damage and lengthy reload time. They also aren't really good for long range shootoff's as the recoil on these bad boys is larger than my will to jump out my window.

Price : $300

HEAD : 148 without helmet and 77 with helmet
CHEST / ARMS : 37 without kevlar and 19 with kevlar
STOMACH : 46 without kevlar and 24 with kevlar
LEGS : 27 with kevlar and 27 without kevlar

===========================================================================
Five-SeveN : Headshot kill potential and a 20-round magazine are both defining features of the Five-SeveN. Its lethality drops off at range, however, and it isn't as accurate as other, cheaper pistols.

Price : $500

HEAD : 125 without helmet and 114 with helmet
CHEST / ARMS : 31 without kevlar and 28 with kevlar
STOMACH : 39 without kevlar and 35 with kevlar
LEGS : 23 with kevlar and 23 without kevlar

===========================================================================
CZ75-Auto : The CZ75-Auto is the only fully automatic pistol in CS:GO, and was added to the game in a 2014 update. It's a high-risk, high-reward weapon that excels in close range, but has only one spare magazine in reserve, so use it wisely.

price : $500

HEAD : 123 without helmet and 95 with helmet
CHEST / ARMS : 30 without kevlar and 23 with kevlar
STOMACH : 38 without kevlar and 29 with kevlar
LEGS : 23 with kevlar and 23 without kevlar

===========================================================================
Desert eagle : The Godfather of all the pistols, the Desert eagle is a fat mf that can kill armored enemies with headshots from across the map, but has a small mag of 7 shots, high recoil and higher spread than the height I want to jump out my window from.

Price : $700

HEAD : 249 without helmet and 232 with helmet
CHEST / ARMS : 62 without kevlar and 58 with kevlar
STOMACH : 77 without kevlar and 72 with kevlar
LEGS : 46 with kevlar and 46 without kevlar

===========================================================================R8 revolver : the R8 is a pistol that was broken at the time of release in cs:go, but is now outclassed by every other weapon in the game due to its shooting load.

price : $600

HEAD : 342 without helmet and 319 with helmet
CHEST / ARMS : 86 without kevlar and 79 with kevlar
STOMACH : 107 without kevlar and 99 with kevlar
LEGS : 64 with kevlar and 64 without kevlar

Glock-18 : The Glock-18 is one of the lowest-damage weapons in the game. BUT. It has a 20-round magazine, plentiful reserve ammo, moderate rate of fire and three-shot burst fire option (absolutely useless) makes it one of the best weapons for pistol rounds.

price : free

HEAD : 118 without helmet and 55 with helmet
CHEST / ARMS : 29 without kevlar and 13 with kevlar
STOMACH : 37 without kevlar and 17 with kevlar
LEGS : 22 with kevlar and 22 without kevlar

===========================================================================
P250 : The P250 is the cheapest weapon in CS:GO capable of dealing one-hit headshot kills to helmeted enemies, and it does more damage to armored enemies than the spawn pistols, but it only has two reserve ammo magazines.

Price : $300

HEAD : 151 without helmet and 96 with helmet
CHEST / ARMS : 37 without kevlar and 24 with kevlar
STOMACH : 47 without kevlar and 30 with kevlar
LEGS : 28 with kevlar and 28 without kevlar

===========================================================================
Dual berettas : the Dual Berettas are capable of an incredible rate of fire and large ammo capacity, but they suffer from low damage and lengthy reload time. They also aren't really good for long range shootoff's as the recoil on these bad boys is larger than my will to jump out my window.

Price : $300

HEAD : 148 without helmet and 77 with helmet
CHEST / ARMS : 37 without kevlar and 19 with kevlar
STOMACH : 46 without kevlar and 24 with kevlar
LEGS : 27 with kevlar and 27 without kevlar

===========================================================================
Tec-9 : The Tec-9 straddles the line between pistols and submachine guns. It's dangerous af in close quarters and can be fired at high speed, but it suffers from less-than-ideal accuracy, recoil, and a huge spread.

Price : $500

HEAD : 140 without helmet and 70 with helmet
CHEST / ARMS : 34 without kevlar and 17 with kevlar
STOMACH : 43 without kevlar and 22 with kevlar
LEGS : 26 with kevlar and 26 without kevlar

===========================================================================
CZ75-Auto : The CZ75-Auto is the only fully automatic pistol in CS:GO, and was added to the game in a 2014 update. It's a high-risk, high-reward weapon that excels in close range, but has only one spare magazine in reserve, so use it wisely.

price : $500

HEAD : 123 without helmet and 95 with helmet
CHEST / ARMS : 30 without kevlar and 23 with kevlar
STOMACH : 38 without kevlar and 29 with kevlar
LEGS : 23 with kevlar and 23 without kevlar

===========================================================================
Desert eagle : The Godfather of all the pistols, the Desert eagle is a fat mf that can kill armored enemies with headshots from across the map, but has a small mag of 7 shots, high recoil and higher spread than the height I want to jump out my window from.

Price : $700

HEAD : 249 without helmet and 232 with helmet
CHEST / ARMS : 62 without kevlar and 58 with kevlar
STOMACH : 77 without kevlar and 72 with kevlar
LEGS : 46 with kevlar and 46 without kevlar

===========================================================================R8 revolver : the R8 is a pistol that was broken at the time of release in cs:go, but is now outclassed by every other weapon in the game due to its shooting load.

price : $600

HEAD : 342 without helmet and 319 with helmet
CHEST / ARMS : 86 without kevlar and 79 with kevlar
STOMACH : 107 without kevlar and 99 with kevlar
LEGS : 64 with kevlar and 64 without kevlar

feel free to correct me in the comments.
please award this guide.
I am locked up in Obama's basement til I get 250 awards.
<3 (no H0mo)