Your search for "MQM8520" revealed the following:
Mellanox MQM8520-H CS8500 Series 40x 200GB QSFP56 Spine Switch Blade
SKU: NSB-6803
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 5,344.99
• 5 in stock
Call if you need more
NEW Mellanox MQM8520-H CS8500 Series 40x 200GB QSFP56 Spine Switch Blade
SKU: NSN-4766
Condition: New
Shipping: Overnight Options
Warranty: 365 days
$ 5,462.99
• 5 in stock
Call if you need more