Your search for "DCS-7800-SUP1A" revealed the following:
Arista DCS-7800-SUP1A 7800R3 Series Supervisor1A Module
SKU: NSB-9377
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 8,999.99
• Only 1 remaining
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Arista DCS-7800R3-36D-LC 7800R3 Series 36x 400GB QSFP-DD Switch Line Card
SKU: NSB-9391
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 25,312.99
• Only 2 remaining
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Arista DCS-7800R3-36P-LC 7800R3 36x 400 Gigabit QSFP Switch Line Card
SKU: NSH-9595
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 7,875.99
• Only 2 remaining
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Arista DCS-7808R3-FM 7800R3 Series Switch Fabric Module for 7808 Chassis
SKU: NSB-0990
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 1,057.99
• 19 in stock
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Arista DCS-7800R3-48CQM-LC 48x 100GB QSFP28 w/ MACsec Router Line Card
SKU: NSB-0973
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days