TheyCallMeSak, what you mention is DVD-RAM, not DVD-R. DVD-R writers are thousand dollar machines. i do not know the cost of the media.
DVD-RAM is much cheaper, and who said anything about pirating. Think about making your own videos, or backup for your computer. it's around $50 for a double sided 4.7 per side disc. Now that's around $100 for 18.8 GB set which is along the lines of a HDD a few months ago (or now, depending). For a rewritable REMOVABLE medium, it's cheap MB\$$.