Your search for "ws-c3850-12xs" revealed the following:
Cisco WS-C3850-12XS-E Catalyst 3850 12x 10GB SFP+ 1x Module Slot Switch
SKU: NSH-8457
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 361.99
• Only 2 remaining
Call if you need more
Cisco WS-C3850-12XS-S Catalyst 3850 12x 10GB SFP+ 1x Module Slot Switch
SKU: NSH-4647
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 299.99
• Only 2 remaining
Call if you need more
Cisco PWR-C1-350WAC 350W AC Power Supply for Catalyst 9300, 3850, 3650
SKU: NSB-4176
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 42.99
• 29 in stock
Call if you need more
NEW Cisco WS-C3850-12XS-S Catalyst 3850 12x 10GB SFP+ 1x Free Mod Slot Switch
SKU: NSN-3314
Condition: New
Shipping: Overnight Options
Warranty: 365 days
$ 1,522.99
• Only 2 remaining
Call if you need more
NEW Cisco WS-C3850-12XS-E 12x 10GB SFP+ 1x Module Slot Switch
SKU: NSN-4649
Condition: New
Shipping: Overnight Options
Warranty: 365 days