Arcane magic is seen as a science. It is a force that can be controlled through formula and incantation. Divine magic is quite different: it is a miracle of faith. True clerics are rare. They are the crusaders of the church, skilled in battle and capable of channeling the power of their deity. The vast majority of priests are experts who possess no spellcasting ability whatsoever. An average religious expert might possess Knowledge (religion), Knowledge (History), Heal, Diplomacy, and Sense Motive, and use these skills to provide spiritual guidance to her community. A cleric of any level is a remarkable figure.
A side effect of this is that most temples do not sell divine spells. To begin with, many temples don't have a divine spellcaster. Those that do will not sell the gifts of their god for mere gold. If the petitioner is a loyal member of the faith, an adept may aid him at no cost, or the adept may set a price based on the abilities of the adventurer, calling upon him to make a sacrifice to prove his faith or perform a service in the name of the church. The more powerful the spell, the more significant the sacrifice or service. If a nonbeliever serves the cause of the church, it's possible a priest will provide assistance, but a temple is not a marketplace. No one can demand a miracle as if purchasing a spell from a wizard's guild. Needless to say, this makes a character's choice of religion an important decision.
There is a notable exception to this rule: corrupt clerics. There are occasionally priests who are more interested in lining their pockets than serving the faithful. If you can find such a cleric, you can purchase any spell (s)he can cast, though rates may vary.
Greater Gods and Goddesses
CE Aralias- King of Lies:
Symbol: A winged black heart
Worshipers: Assassins, Interrogators, Spies, Beggars, Merchants
Cleric Alignments: CE, CN, NE
Domains: Labyrinth, Luck, Secrets, Trickery
Favored Weapon: Dagger
NN Duergona- Mistress of Time:
Symbol: An empty hour glass inside a thick ring
Worshipers: The dying, Sages, Sorcerers,
Cleric Alignments: CN, LN, NE, NG, NN
Domains: Death, Desperation, Neutrality, Secrets
Favored Weapon:
NG Exeral- Queen of Peace:
Symbol: A pair of interlocking rings, normally made of two different materials
Worshipers: Diplomats, The oppressed, Slaves, The sick
Cleric Alignments: CG, LG, NG, NN
Domains: Diplomacy, Guardian, Healing, Protection
Favored Weapon: Net
LN Forge- Lord of Dwarves:
Symbol: A golden anvil
Worshipers: Dwarves, Miners, Craftsmen
Cleric Alignments: LE, LG, LN, NN
Domains: Earth, Fabrication, Law
Favored Weapon: Warhammer
NG Incantari- God of the Shihobi:
Symbol: Four trumpets pointing in different directions, but joined along their necks so that there is an open square in the center
Worshipers: The Shihobi, Druids, Rangers
Cleric Alignments: CG, LG, NG, NN
Domains: Good, Nature, Travel, Weather
Favored Weapon: Lance
CN Keterin- Keeper of the Books:
Symbol: An open tome wreathed in flame
Worshipers: Inventors, Artisans, Alchemists, Wizards, Bards
Cleric Alignments: CE, CG, CN, NN
Domains: Chaos, Fabrication, Knowledge, Magic
Favored Weapon:
NE Mordeck- Lord of Death:
Symbol: Three interlinked circles inside a triangle
Worshipers: Necromancers, Sentient undead,
Cleric Alignments: CE, LE, NE, NN
Domains: Death, Evil, Spirit, Rot
Favored Weapon:
LN Ravich- Defender of Truth:
Symbol: A snowflake
Worshipers: Paladins, Judges, Magistrates, Lawyers, Police, Monks
Cleric Alignments: LE, LG, LN, NN
Domains: Justice, Law, War, Water
Favored Weapon: Spiked chain
CG Silveria- Goddess of Nature:
Symbol: A butterfly mask
Worshipers: Elves, Peasants, Farmers, Gardeners, Druids
Cleric Alignments: CG, CN, NG
Domains: Animal, Earth, Nature, Plant
Favored Weapon: War fan
LE Tiamaur- Queen of Darkness:
Symbol: A black dragon skull in a field of black
Worshipers: Assassins, Nihilists, Tyrants, Criminals
Cleric Alignments: LE, LN, NE
Domains: Darkness, Evil, Law, Tyranny
Favored Weapon: Heavy Pick
LG Valaris- Lord of Flames:
Symbol: A crown of flames
Worshipers: Paladins, Heroes, Noble rulers, Healers, Undead slayers
Cleric Alignments: LG, LN, NG
Domains: Fire, Leadership, Purification, Sun
Favored Weapon: Light flail