Your search for "MMA4Z00-NS" revealed the following:
nVidia MMA4Z00-NS-FLT 800GB 850nm 50m MMF OSFP Transceiver
SKU: NSB-4521
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 305.99
• Only 2 remaining
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nVidia Mellanox MMA4Z00-NS 800GB 2x SR4 MMF 850nm 50m DOM Transceiver OSFP
SKU: NSB-4231
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 439.99
• Only 2 remaining
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NEW nVidia Mellanox MMA4Z00-NS 800GB 2x SR4 MMF 850nm 50m DOM Transceiver OSFP
SKU: NSN-1075
Condition: New
Shipping: Overnight Options
Warranty: 365 days
$ 919.99
• Only 2 remaining
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nVidia Mellanox MMA4Z00-NS400 400GBASE-SR4 850nm 50m DOM MMF OSFP Transceiver
SKU: NSB-4265
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 887.99
• Only 2 remaining
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NEW nVidia Mellanox MMA4Z00-NS400 400GBASE-SR4 850nm DOM MMF OSFP Transceiver
SKU: NSN-0230
Condition: New
Shipping: Overnight Options
Warranty: 365 days
$ 925.99
• Only 2 remaining
Call if you need more