[speeder]

Where I live piracy is people on the street selling media with pirated content (currently, DVD-R and all... but there was a time when it was diskette or even tape too).

Sometimes they sell it for MORE than the original, so why people buy the pirated one?

Because the pirated one is often:

  easier to pay (just hand over the cash instead of international wire).
  better support (often the piracy dealers double as tech support!)
  better patches (often pirated content is patched  with fan patches, DRM removal, and whatnot)
  better translation (often pirated content include fan translation).