Your search for "c2960s-stack" revealed the following:
Cisco C2960S-STACK Catalyst 2960-S 2x FlexStack Stacking Port Switch Module
SKU: NSH-1220
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 14.99
• 49 in stock
Call if you need more
Cisco WS-C2960S-48FPD-L Catalyst 2960-S 48x 1GB PoE RJ45 2x 10GB SFP+ Switch
SKU: NSH-2150
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 149.99
• Only 2 remaining
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Cisco WS-C2960S-48LPS-L 48x 1GB PoE+ RJ45 2x 1GB SFP Switch
SKU: NSH-2107
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 149.99
• Only 2 remaining
Call if you need more