Your search for "MCX75310AAS-NEAT" revealed the following:
nVidia Mellanox MCX75310AAS-NEAT 900-9X766-003N-SQ0 1x 400GB OSFP NIC
SKU: NSC-0030
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 1,538.99
• 40 in stock
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NEW nVidia Mellanox MCX75310AAS-NEAT 900-9X766-003N-SQ0 1x 400GB OSFP NIC
SKU: NSN-1225
Condition: New
Shipping: Overnight Options
Warranty: 365 days
$ 1,761.99
• Only 2 remaining
Call if you need more