Your search for "C6840-X" revealed the following:
Cisco C6840-X-1100W-AC Catalyst 6800X Series 1100W AC Switch Power Supply
SKU: NSH-8669
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 239.99
• Only 2 remaining
Call if you need more
Cisco C6840-X-LE-40G Catalyst 6800X 40x 10GB SFP+ 2x 40GB QSFP+ Switch
SKU: NSH-8671
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 2,299.99
• Only 2 remaining
Call if you need more
Cisco C6840-X-750W-AC Catalyst 6800X Series 750W AC Switch Power Supply
SKU: NSH-8670
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 69.99
• 12 in stock
Call if you need more
NEW Cisco C6840-X-1100W-AC Catalyst 6800X Series 1100W AC Switch Power Supply
SKU: NSN-2611
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco C6840-X-LE-40G Catalyst 6800X 40x 10GB SFP+ 2x 40GB QSFP+ Switch
SKU: NSN-7757
Condition: New
Shipping: Overnight Options
Warranty: 365 days