

It seems that User's Side is selling one or two units of 120GB Maxtor Serial ATA HDD bundled with PCI Serial ATA card.
120GB SATA HDD + 120GB SATA HDD + Promise SATA 2-channel = 58,580 Yen (about 500 US.)
http://www.users-side.co.jp/shopping/list_nfrm_sale_sata150.php