LoL items yo.

Regen is written as per 1 second.

All items with more than one stat are calculated as the following example;
Philosopher's Stone costs:
180 gold for the Bead
180 gold for the Charm and
340 in recipe cost.

180+180 = 360 is what the basic items cost, the Bead costs 180/360 = 0.5
0.5 * 340 (the recipe) is 170.
180+170 = 350.
The health regen of Philosopher's Stone effectively costs 350 gold.

Health Regen:
Rejuvenation Bead, 180 gold/stat
Emblem of Valor, 174.1 gold/stat alone, 87 gold as 2, 58 gold as 3, 44 gold as 4, and 35 gold as 5
Philosopher's Stone, 250 gold/stat
Spirit Stone, 77.9 gold/stat
Eleisa's Miracle, 275 gold/stat

Mana Regen:
Faerie Charm, 300 gold/stat
Mana Manipulator, 333 gold/stat if you're alone, 167 gold as 2, 111 gold as 3, 83 gold as 4, and 67 gold as 5.
Philosopher's Stone, 194.4 gold/stat
Tear of the Goddess, 155.2 gold/stat
Spirit Stone, 155.8 gold/stat
Chalice of Harmony, 195.1 gold/stat, too lazy to count in the passive on average champion.
Fiendish Codex, 243.9 gold/stat
Eleisa's Miracle, 183.3 gold/stat



Health:
Ruby Crystal, 2.6 gold/stat
Giant's Belt, 2.5 gold/stat
Sightstone, 7 gold/stat
Catalyst, 3.3 gold/stat
Ruby Sightstone, 4.3 gold/stat
Phage, 4 gold/stat
Haunting Guise, 3.9 gold/stat

Mana:
Sapphire Crystal, 2 gold/stat
Tear of the Goddess, 1.9 gold/stat unstacked, 0.8 gold halfstacked and 0.5 gold fully stacked.
Catalyst, 1.8 gold/stat
Sheen, 3 gold/stat
Glacial Shroud, 1.8 gold/stat


Ability Power:
Amplifying Tome, 21.8 gold/stat
Kage's Lucky Pick, 30.6 gold/stat
Fiendish Codex, 23.6 gold/stat
Hextech Revolver, 30 gold/stat
Mejai's Soulstealer, 61.8 gold/stat unstacked, 20.6 gold with 5 stacks, 12.4 gold with 10 stacks, 8.8 gold with 15 stacks, and 6.9 gold with 20 stacks
Sheen, 26.3 gold/stat
Haunting Guise, 11 gold/stat
Needlessly Large Rod, 20 gold/stat
Malady, 28.7 gold/stat


Attack Damage:
Long Sword, 40 gold/stat
Sword of the Occult, 120 gold/stat unstacked, 34.3 gold with 5 stacks, 20 gold with 10 stacks, 14.1 gold with 15 stacks, and 10.9 gold with 20 stacks.
Brutalizer, 53.5 gold/stat
Hexdrinker, 27 gold/stat
Phage, 33.5 gold/stat
B.F. Sword, 34.4 gold/stat
Infinity Edge, 41.7 gold/stat


Attack Speed:
Dagger, 33.3 gold/percentage
Berserker's Greaves, 24 gold/percentage
Recurve Bow, 31.6 gold/percentage
Zeal, 32.6 gold/percentage
Stinger, 31.25 gold/percentage
Sword of the Divine, 50 gold/percentage
Malady, 29.3 gold/percentage
Wit's End, 38.7 gold/percentage
Phantom Dancer, 24 gold/percentage


Crit Chance:
Brawler's Gloves, 50 gold/percentage
Cloak of Agility, 48.7 gold/percentage
Zeal, 58.8 gold/percentage
Phantom Dancer, 53.3 gold/percentage

Armor:
Cloth Armor, 20 gold/stat
Emblem of Valor, 20.3 gold/stat
Madred's Razors, 28 gold/stat
Chain Vest, 18 gold/stat
Ninja Tabi, 18.5 gold/stat
Warden's Mail, 22 gold/stat
Glacial Shroud, 24.1 gold/stat
Thornmail, 22 gold/stat

Magic Resistance:
Null-Magic Mantle, 20 gold/stat
Chalice of Harmony, 6.9 gold/stat
Mercury, 25.6 gold/stat
Hexdrinker, 27 gold/stat

Cooldown Reduction (calculated using recipe cost)
Fiendish Codex, 38.5 gold/percentage
Boots of Lucidity, 23.3 gold/stat
Stinger, 45 gold/percentage
Brutalizer, 53.7 gold/percentage
Glacial Shroud, 25.3 gold/percentage

Spell Vamp (calculated using recipe cost)
Hextech Revolver, 27.5 gold/percentage