Your search for "SFP-10G-BX40D-I" revealed the following:
NEW Cisco SFP-10G-BX40D-I 10GB BASE-BX40-D Single-Strand 1330nm BiDI SMF SFP+
SKU: NSN-4497
Condition: New
Shipping: Overnight Options
Warranty: 365 days
$ 857.99
• 10 in stock
Call if you need more
Cisco SFP-10G-BX40D-I 10GB BASE-BX40-D 1330nm Bidirectional SMF SFP+ Transceiver
SKU: NSH-4626
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 582.99
• 16 in stock
Call if you need more