Your search for "10309" revealed the following:

Extreme 10309 10GB BASE-ER LC 1550nm SMF LC SFP+ Transceiver

SKU: NSB-4883
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Extreme 10309 10GB BASE-ER LC 1550nm SMF LC SFP+ Transceiver

SKU: NSN-6204
Condition: New
Shipping: Overnight Options
Warranty: 365 days