Your search for "N540-24Z8Q2C-SYS" revealed the following:
NEW Cisco N540-24Z8Q2C-SYS 24x 10GB SFP+ 8x 25GB SFP28 2x 100GB QSFP28 Router
SKU: NSN-0727
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Cisco N540-24Z8Q2C-SYS 24x 10GB SFP+ 8x 25GB SFP28 2x 100GB QSFP28 Router
SKU: NSB-8195
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days