Your search for "SFP-10G-USR" revealed the following:
NEW Extreme 10G-SFPP-USR-SA 10GB BASE-USR 850nm MMF LC (TAA) SFP+ Transceiver
SKU: NSN-8985
Condition: New
Shipping: Overnight Options
Warranty: 365 days
$ 21.99
• 59 in stock
Call if you need more
Ruckus 10G-SFPP-USR 10GB BASE-USR 850nm MMF LC SFP+ Transceiver
SKU: NSH-7173
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 15.99
• Only 2 remaining
Call if you need more
Extreme 10G-SFPP-USR-SA 10GB BASE-USR 850nm MMF LC (TAA) SFP+ Transceiver
SKU: NSB-3130
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 19.99
• 59 in stock
Call if you need more
Juniper QFX-SFP-10GE-USR 10 Gigabit USR MMF Optical SFP+ Transceiver
SKU: NSB-5042
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 48.99
• 13 in stock
Call if you need more
NEW Juniper QFX-SFP-10GE-USR 10 Gigabit USR MMF Optical SFP+ Transceiver
SKU: NSN-7088
Condition: New
Shipping: Overnight Options
Warranty: 365 days
$ 51.99
• Only 2 remaining
Call if you need more
Dell SFP-10G-USR 7D64H 10GB BASE-USR 850nm MMF LC SFP+ Transceiver
SKU: NSB-5926
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days