How much is shipping?
$6 to the US, and $14 for the rest of the world.
What's the difference between NTSC and PAL?
They refer to the type of television used in your country.
|USA, Japan, Canada, Brazil, some of South America|
|UK, Spain, France, most of Europe, Australia|
To see a more complete list, look here
How can I tell which one I have?
Look at the bottom rear edge of one of your games.
NTSC games will have a small notch on each outermost edge, and are labeled NUS-USA on the back label.
PAL games have that same notch inset about 6mm, and also are labeled NUS-EUR-1.