shops that I might buy from in the future

• Playing Card Decks — Good photos, good categorization. I've ordered from them a number of times.
• Rare Playing Cards — I've ordered from them once.
• Cardvocate
• Playing Cards.net
• Socal Playing Cards
• TODO: maybe add more from his list? scroll down a page

Shops that don't solely focus on playing cards:

• Vanishing Inc. Magic

Specialty sites:

• Cartomancer Cards — producer of the "Clarity" and "Shadow" decks — EACH card has a different piece of artwork, even the numbered cards