Your search for "msb7800" revealed the following:
Nvidia Mellanox MSB7800-ES2F 36x 100GB QSFP28 B-F Airflow (P2C) Switch
SKU: NSB-6781
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 1,339.99
• Only 2 remaining
Call if you need more
NEW Nvidia Mellanox MSB7800-ES2F 36x 100GB QSFP28 B-F Airflow (P2C) Switch
SKU: NSN-7914
Condition: New
Shipping: Overnight Options
Warranty: 365 days
$ 6,785.99
• Only 1 remaining
Call if you need more
Nvidia Mellanox MSB7800-ES2R 36x 100GB QSFP28 F-B Airflow (C2P) Switch
SKU: NSB-6782
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days