I've tried to document some of the places I've found useful items for a new player in Map Section 1 for other new clan members. Please feel free to correct or add to my list I will edit to update. Mostly I wish I had found reliable coordinates for most of these shops earlier in the game. Enjoy:
Warning: Above y=50 is not recommended for low level characters though not strictly restricted anymore.
********************Backpacks **********************
Hiking Backpack $1820 6.2 lbs Enc +80
--Religious Cult HQ - Armory (21,40)
--Autumn Leaves Supply store (32,82)
********************Helmets **********************
Riot Helmet $1950 3.5 lbs. Armor: 10
--Prison Porter’s cell (16,128)
Mich Helmet $2250 3.6 lbs. Armor: 10
--Stadium (20,47)
********************Body Armor **********************
Heavy Leather Jacket $2100 Sell: $1250 6.5 lbs. Armor: 11 Agility -3 Enc +2
--Winchester Bar (45,32) **** FREE QUEST ITEM ****
--Gary's Gun Store (inside) (23,15)
--Gang Members Hangout (inside) (18,35)
Armor Vest $7650 6.4 lbs Armor: 20 Agility -1 Enc+10
--Hardballer Gun Store (41,28)
--Germaine's Gunstore (inside) (56,47)
--Prison Porter’s cell (16,128)
Quarantine BDU Vest $9100 5.9 lbs. Armor: 21 Enc +5 Agility -1
--CDC Commando Post (inside) (6,144)
********************Leg Armor **********************
BDU Pants (Desert) $550 1.6 lbs. Armor: 6 Enc +5 Agility +1
--Hardballer Gun Store (41,28)
Fire Resistant Pants $725 4 lbs. Armor: 9 Enc+5 Agility -1
--Pawn Shop (32,44)
Riot Pants $2500 Sell: $1240 3.4 lbs. Armor: 12 Agility -2
--Prison Wing D (17,128) **FREE QUEST ITEM CHOICE**
--Prison Porter’s cell (16,128)
********************Face Armor **********************
Meistro Ind. Combat Mask $120 3.4 lbs. Armor: 3
--Pawn Shop (32,44)
Biosuit Headgear $385 2 lbs. Armor: 5 Marksmanship -3
--Mercy University Hospital - Storage Room (47,42)
********************Gloves **********************
Police Deputy Gloves $85 0.8 lbs. Armor: 4 Agility +2
? Premium Now?
-- 5th Ave Police Station Free Quest Item ??
Riot Gloves $450 Sell:$160 1.1 lbs. Armor: 4 Agility -1 Close Combat +1
--Prison Wing D (17,128) **FREE QUEST ITEM**
--Prison Porter’s cell (16,128)
********************Boots **********************
Jungle Boots $375 1.5 lbs. Armor: 4 Agility +3
--Religious Cult HQ - Armory (21,40)
--Gary's Gun Store (inside) (23,15)
Riot Boots $900 1.7 lbs. Armor: 5 Agility -1
--Prison Porter’s cell (16,128)
********************Weapons **********************
Compound Bow $975 4 lbs. Base Dam: 6-13 Crit Dam: 15-32.5 Range: 90 Magazine: 10 *Reusable Arrows (Most of the time)*
--Hunting Gallery (23,29)
--Master of Sports (33,33)
Japanese Sword $650 1 lbs. Base Dam: 5-7 Crit Dam: 14-19.6 Close Combat +8
--Blades of Steel (27,41)
Green Inc. Varmint Rifle 5.56mm $2950 8.25 lbs. Base Dam: 12-16 Range: 110 Magazine: 5 rounds
--"Hunting Gallery" Hunting Gear Shop (inside) (23,29)
********************Craftable Weapons **********************
Cement Saw ($3000)+Saw Blade ($19) To craft the Ripper (A very good close combat weapon)
--Hardware Store (29,26)
Overland Shotgun $3850 +Pitchfork $120 To craft Boomstick (A very good shotgun)
--Olga Antiques (22,32)
** also need Duct Tape at --Hardware Store (29,26)