4.7GB DVD-R sell for 1 USD (9 SEK) here in Sweden, ofcourse you can get a DVD-R for as much as 10 USD if you buy some expensive brands... The cheap DVD-R's work fine with the PS2, XBOX, etc as well.
You do want to be careful with cheap media though. I've tried to copy a couple of my movies to see how it'd turn out, and they start to stutter at about 30 minutes in.
