Your search for "ds-x9448-768k9" revealed the following:
Cisco DS-X9448-768K9 MDS 9700 48x 16G Fibre Channel SFP+ Switch Module
SKU: NSH-3320
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 139.99
• 32 in stock
Call if you need more
NEW Cisco DS-X9448-768K9 MDS 9700 48x 16GB Fibre Channel SFP+ Switch Module
SKU: NSN-1868
Condition: New
Shipping: Overnight Options
Warranty: 365 days
$ 312.99
• 6 in stock
Call if you need more