Your search for "FG-600E" revealed the following:
Fortinet FG-600E 36 Gbps Registrable / Unclaimed Firewall
SKU: NSC-0244
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 1,169.99
• Only 1 remaining
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Fortinet FG-600E 36 Gbps Local Management Only Firewall
SKU: NSB-2305
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 587.99
• Only 2 remaining
Call if you need more