Your search for "220-48t-10ge4" revealed the following:
Extreme 16564 220-48t-10GE4 48x 1GB RJ45 4x 10GB SFP+ Switch
SKU: NSB-9099
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 489.99
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NEW Extreme 16564 220-48t-10GE4 48x 1GB RJ-45 4x 10GB SFP+ Switch
SKU: NSN-0803
Condition: New
Shipping: Overnight Options
Warranty: 365 days