This is where you buy your supplies, remember you start out with 2,000 gil. You can sell any items you find for 1/2 their price. Sales will go on every now and then.
Items
8-Inch Cannon-4,000 gil | Very Powerful damage on against opponent
Antartic Wind-800 gil | Casts Ice2 on all opponents
Antidote-100 gil | The cure for poison status
Bird Wing-800 gil | Casts Aero2 on all opponents
Bolt Plume-800 gil | Casts Bolt2 on all opponents
Carob Nut-10,000 gil | For special chocobo breeding
Cornucopia-100 gil | The cure for Mini status
Curiel Greens-500 gil | For chocobo capture
Dazers-2,000 gil | Casts Stop on one opponent
Deadly Waste-800 gil | Casts Bio2 on all opponents
Dragon Fang-500 gil | Lightning Damage against all opponents
Dragon Scales-800 gil | Casts Water on all opponents
Dream Powder-1,000 gil | Casts Sleep on all opponents
Earth Drum-800 gil | Casts Quake2 on all opponents
Echo Screen-100 gil | The cure for Silence
Elixir-20,000 gil | Completely restores all lost MP and HP
Ether-1,500 gil | Restores 100 MP of loss MP
Fire Fang-800 gil | Casts Fire2 on all opponents
Fire Veil-1,000 gil | Casts Fire3 on all opponents
Ghost Hand-500 gil | Absorbs MP from one opponenet
Graviball-500 gil | Casts Demi on one opponent
Grenade-80 gil | Small Damage when used against opp.
Guard Source-50,000 gil | Permanently raises Vitality by 1 point
Hero Drink-5,000 gil | Raises random stat by 20 pts. 1/battle
Hi-Potion-1,000 gil | Restores 500 HP of loss HP
Holy Touch-1,000 gil | Casts DeSpell on one ally
Hyper-100 gil | The cure for Sadness
Ice Crystal-1,000 gil | Casts Ice3 on all opponents
Impaler-1,000 gil | Changes one opponent to a Frog
Krakka Greens-600 gil | For chocobo capture
Nut-5,000 gil | For chocobo breeding
Light Barrier-2,000 gil | Casts Barrier on all
Loco Weed-1,000 gil | Casts Confusion on all opponents
Luck Source-50,000 gil | Permanently raises Luck by 1 point
Magic Source=50,000 gil | Permanently raises Magic by 1 point
Maiden's Kiss-200 gil | The cure for Frog status
Megalixir | Completely restores HP/MP to All allies
Mimett Greens-900 gil | For chocobo capture
Mind Source-50,000 gil | Permanently raises Spirit by 1 point
Molotov-500 gil | Weak fire-type damage on one opponent
M-Tentacles-1,000 gil | Casts Bio3 on all opponents
Mute Mask-800 gil | Casts Silence on all opponents
Pahsana Greens-800 gil | For chocobo capture
Pheonix Down-300 gil | Revives a character to 15% HP
Potion-200 gil | Restores 100 HP of loss HP
Power Source-50,000 gil | Permanently raises Strength by 1 point
Reagan Greens-1,000 gil | For chocobo capture
Remedy-4,000 gil | Cures all abnormal statuses
Shrapnel-500 gil | Small Damage when used against all opp.
Shrivel-1,000 gil | Casts Mini on one opponent
S-Mine-5,000 gil | Powerful Damage against one opponent
Smoke Bomb-300 gil | Allows easier escape from battle
Soft-100 gil | The cure for Stone status
Speed Drink-2,000 gil | Casts Haste on one party member
Speed Source-50,000 gil | Permanently raises Speed by 1 Point
Spider-Web-1,000 | Casts Slow on all opponents
Star Dust-5,000 gil | Casts Comet2 on all opponents
Swift Bolt-800 gil | Casts Bolt3 on all opponents
Sylkis Greens-1,500 gil | For chocobo capture
Tranquilizer-100 gil | The cure for Fury/Berserk status
T/S Bomb-1,000 gil | Casts Demi2 against one opponents
Turbo Ether-3,500 gil | Completely Restores all lost MP
Vaccine-1,000 gil | Use in advance to prevent transformation
Vampire Fang-400 gil | Absorbs HP from one opponent
War Gong-800 gil | Casts Berserk on all opponents
X-Potion-10,000 gil | Completely restores all loss HP
Zeio Nut(must steal) | For special chocobo breeding
Special Items
Ancient Key(must find) | For use to get into the City of Ancients
Basement Key(must find) | For getting into Shin-Ra Mansion basement
Black(METEO) Materia(must find) | Most powerful materia, cast Ultimate Comet and kills everyone online except for the caster, only one (symbol of power)
Glacier Map-10,000 gil | Need it to navigate through Great Glacier
Huge Materia(all 4 of them must be found) | To acquire Master Materia, splits into master materia when you give it the others (ALL mastered, must own it)
Keycard(must find) | For use in Shinra Tower
Keystone(must find | Used to get into The Temple of Ancients
Leviathan Scales(must find) | For use to put out fire in Da Chao
Snowboard-5,000 gil | For use to get to Great Glacier
White(HOLY)Materia(must find) | The other most powerful materia, casts Ultimate guard, a move that protects the caster and people he/she choses from Ultimate Comet,only one
Vehicles
Buggy-2,000 gil For getting across rivers, encounter less battles
Small Boat-4,000 gil For traveling in shallow waters, can only come ashore at beaches, you encounter few water enemies while traveling in this
Submarine-10,000 gil Used for traveling in deep waters and to locate underwater areas, you encounter no enemies
The Highwind-50,000 gil Used for flying over anything, can only land in grassy, clear areas. You encounter no enemies while flying, other vehicles can be transported
G-Bike-1,000 gil Used for fast traveling over land, same encounter rate with enemies
Materia For Sale
Lightning-1,000 gil
Ice-1,000 gil
Fire-1,000 gil
Restore-2,500 gil
Transform-3,000 gil
Earth-1,500 gil
Poison-1,000 gil
Heal-2,000 gil
Barrier-5,000 gil
Steal-2,000 gil
Sense-1,000 gil
Chocobo Lure-2,000 gil
HP Plus-8,000 gil
Gil Plus(can only be bought at Gold Saucer)-10,000 gil