For LOB:
The pieces of Exodia are:
LOB-120 Right Leg of the Forbidden One
LOB-121 Left Leg of the Forbidden One
LOB-122 Left Arm of the Forbidden One
LOB-123 Left Arm of the Forbidden One
LOB-124 Exodia the Forbidden One
The fusions are:
LOB-003 Flame Swordsman Fusion Monster = "Flame Manipulator + "Masaki the Legendary Swordsman"
LOB-015 Charubin the Fire Knight = "Monster Egg" + "Hinotama Soul"
LOB-019 Darkfire Dragon = "Firegrass" + "Petit Dragon"
LOB-022 Fusionist = "Petit Angel" + "Mystical Sheep #2"
LOB-029 Flame Ghost = "Skull Servant" + "Dissolverock"
LOB-086 Dragoness the Wicked Knight = "Armaill" + "One-Eyed Shield Dragon"
LOB-102 Metal Dragon = "Steel Ogre Grotto #1" + "Lesser Dragon"
LOB-107 Flower Wolf = "Silver Fang" + "Darkworld Thorns"
LOB-125 Gaia the Dragon Champion = "Gaia The Fierce Knight" + "Curse of Dragon"
The more expensive cards are:
Blue-Eyes White Dragon
Dark Magician
Exodia the Forbidden One and the four pieces of Exodia
Flame Swordsman
Gaia the Dragon Champion
Gaia the Fierce Knight
Monster Reborn
Raigeki
Red-Eyes B. Dragon
For MRD:
MRD-000 Gate Guardian = "Sanga of the Thunder", "Kazejin" and "Suijin"
MRD-007 Larvae Moth -> After "Petit Moth" has been equipped with "Cocoon of Evolution"."
MRD-018 B. Skull Dragon = "Summoned Skull" + "Red-Eyes B. Dragon"
MRD-020 Roaring Ocean Snake = "Mystic Lamp" + "Hyosube"
MRD-038 Deapsea Shark = "Bottom Dweller" + "Tongyo"
MRD-041 Kaminari Attack = "Ocubeam + "Mega Thunderball"
MRD-046 Empress Judge = "Queen's Double" + "Hibikime"
MRD-077 Rabid Horseman = "Battle Ox" + "Mystic Horseman"
MRD-091 Labyrinth Tank = "Giga Tech Wolf" + "Cannon Soldier"
MRD-093 Bickuribox = "Crass Clown" + "Dream Clown"
MRD-100 Punished Eagle = "Blue-Winged Crown" + "Niwatori"
MRD-103 Musician King = "Witch of the Black Forest" + "Lady of Faith"
MRD-105 Cyber Saurus = "Juggler" + "Two-Headed King Rex"
MRD-120 Twin-Headed Thunder Dragon = "Thunder Dragon" + "Thunder Dragon"
MRD-123 Skull Knight = "Tainted Wisdom" + "Ancient Brain"
MRD-143 Thousand Dragon Fusion Monster = "Time Wizard" + "Baby Dragon"
The more expensive cards are:
B. Skull Dragon
Gate Guardian
Horn of Heaven
Mirror Force
Solemn Judgement
Summoned Skull
Thousand Dragon
Time Wizard
For MRL/SRL (and I prefer MRL because these are the earlier versions of this set):
Cards that are linked to other cards, especially for Ritual Summoning:
MRL-000 Blue-Eyes Toon Dragon (control "Toon World")
MRL-056 Wall Shadow (Special Summoned by offering "Labyrinth Wall" equipped with "Magical Labyrinth" as a Tribute.)
MRL-059 Magical Labyrinth -> Equip "Labyrinth Wall" with this card. If you offer "Labyrinth Wall" equipped with this card as a Tribute, you can Special Summon "Wall Shadow" from your Deck.
MRL-067 Performance of Sword = "Commencement Dance" +
MRL-068 Hungry Burger = "Hamburger Recipe" +
MRL-069 Crab Turtle = "Turtle Oath" +
MRL-071 Manga Ryu-Ran (control "Toon World")
MRL-072 Toon Mermaid (control "Toon World")
MRL-073 Toon Summoned Skull (control "Toon World")
MRL-085 Giant Germ (Special Summon any number of "Giant Germs")
MRL-086 Nimble Momonga (Special Summon any number of "Nimble Momongas")
The more expensive cards are:
Blue-Eyes Toon Dragon
Mystical Space Typhoon (which has been reprinted endlessly)
For PSV:
By this set the practice of naming specific cards for summoning was abandoned. The only expensive card in the set ($20+) is Jinzo.
