These are some really awesome links to further your search for magic. I'm sure you'll find these useful.
This is the biggest site there is with any magic related topic.
This site is just cool for it's list of cards.
You'll find detailed prices of cards on this site where you can also purchase cards. It is a good index resource for finding cards.
This is a top quality site for finding any card.
Gemini Jetpack's home page.