At retail, Nintendo Points Cards are generally sold in the form of codes on scratch-cards providing 1000, 2000, or 3000 Nintendo Points (in Japan, there is a card which provides 5000 Nintendo Points).
When bought via either the Wii Shop Channel or the Nintendo DSi Shop, 1000 Nintendo Points cost US$10 in the United States, €10 in Europe, £7 for Wii points (£9 for DSi points) in the United Kingdom, and ¥1000 in Japan.