Your search for "N3K-C3016" revealed the following:
Cisco N3K-C3016Q-40GE Nexus 3000 16x 40GB QSFP+ Front-to-Back Airflow Switch
SKU: NSB-6933
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 539.99
• Only 2 remaining
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Cisco N3K-C3016Q-40GE Nexus 3000 16x 40GB QSFP+ Back-to-Front Airflow Switch
SKU: NSH-4693
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 441.99
• Only 2 remaining
Call if you need more
NEW Cisco N3K-C3016Q-40GE Nexus 3000 16x 40GB QSFP+ Back-to-Front Airflow Switch
SKU: NSN-2884
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco N3K-C3016Q-40GE Nexus 3000 16x 40GB QSFP+ Front-to-Back Airflow Switch
SKU: NSN-2524
Condition: New
Shipping: Overnight Options
Warranty: 365 days