Your search for "cbs250-48t" revealed the following:
Cisco CBS250-48T-4X-NA 250 Smart Series 48x 1GB RJ45 4x 10GB SFP+ Switch
SKU: NSB-7377
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 189.99
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NEW Cisco CBS250-48T-4X-NA 250 Smart Series 48x 1GB RJ-45 4x 10GB SFP+ Switch
SKU: NSN-0429
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Cisco CBS250-48T-4G-NA Business 250 Smart 48x 1GB RJ45 4x 1GB SFP Switch
SKU: NSB-7371
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days