We also sell following used cisco SFP mudules:

OC12-IR1/s-4.11
SFP-OC12-LR1
SFP-OC12-SR
SFP-OC12-LR2
SFP-OC12-MM
SFP-OC3-LR2
SFP-OC3-MM
SFP-OC48-SR
SFP-GE-L
SFP-GE-Z
SFP-GE-S
GLC-BX-D
SFP-OC3-LR2
SFP-OC12-IR1
FC2 850 NM
DS-CWDM-1610
ONS-SE-100-FX
DS-SFP-FC-2G-LW
GLC-FE-100BX-D

SPA modules:

SPA-10X1GE
SPA-8X1FE-TX-V2
SPA-8X1GE-V2
SPA-8XCHT1/E1
SPA-2GE-7304
SPA-1XOC12-POS
SPA-8X1GE

Other used cisco modules:

OC48X/POS-LR-SC
EPA-GE/FE-BBRD
WS-X4648-RJ45V-E
WS-X6066-SLB-S-K9
WS-X4012
WS-X4013
WS-X4014
WS-X45-SUP6-E
WS-X4148-RJ45
WS-X4306-GBIC
WS-X4232-L3
WS-X4148-RJ45V
WS-X4248-FE-SFP
WS-X4516-10GE
WS-X4013+TS
WS-X6K-SUP1A-2GE
WS-X6K-SUP2A-2GE
WS-X6548-GE-TX
WS-X6548G-GE-TX
WS-X6148-GE-TX
6516A-GBIC
WS-X6816-GBIC
WS-X6416-GBIC
WS-X6408A-GBIC
WS-X6148-RJ45
WS-X6348-RJ45