DigiTimes has reported that Taiwan's second-tier optical disc manufacturers are currently competiting for OEM orders, quoting prices as low as $0.14-0.15 for a 16x DVD+R/-R disc.
Second-tier Taiwan makers of blank optical discs, including Prodisc Technology and Optodisc Technology, have launch price competition for OEM orders quoting US$0.14-0.15 for a 16x DVD+R/-R disc, 17-18% lower than the general level of US$0.17-0.18, according to industry sources.

CMC Magnetics and Ritek, the top two makers, have not followed suit in lowering prices for 16x DVD+R/-R discs, but have reduced OEM quotations for 8x discs by 10-20%, the sources pointed out.
The article also mentions that 18-20x DVD+R/-R discs will not be in significant demand until the fourth quarter of the year. If you'd like to read more, head on over to DigiTimes.