How can one purchase a real ringtones for mobile phones?

Answer 1

Yes, usually you can go online on most cell phones these days, and pay for which ever ringtone you want. There are also some apps that come preinstalled on certain phones that can help you choose a ringtone.

Answer 2

There are many websites offering ringtones for mobile phones. The chance of finding any free ones are slim, especially if you want a high quality sound.