Your search for "NC55-36X100G-BA" revealed the following:
Cisco NC55-36X100G-BA NCS 5500 Series 36x 100 Gigabit Router Line Card
SKU: NSB-4171
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 864.99
• Only 1 remaining
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NEW Cisco NC55-36X100G-BA NCS 5500 Series 36x 100 Gigabit Router Line Card
SKU: NSN-6605
Condition: New
Shipping: Overnight Options
Warranty: 365 days
$ 7,417.99
• Only 2 remaining
Call if you need more