JAPAN"S TDK has started flogging blank Blu-ray discs to retailers and they cost as much as a top quality recorded DVD movie. The 25GB recordable disc will set you back $19.95 with a rewritable version costing $24.95. TDK plans to release a Blu-ray disc that records on both sides and holds 50GB later this year. This will sell for $47.99 and will be in the shops in December.