said by spectrumhead:Is there any link for those Chinese SFPs that I can check ? There is a big difference in price between $500 and $1250.
Beware of seconds, they may match the specs on paper, but once in service and aging they may not turn out to be such a good deal long term and if you do not have a light meter, you will not a have a benchmark to work from if and when the link fails.