I'm not sure what part of the world you are from but buying used OE parts (instead of new) is common practice in Asia because of the widespread sales of fake Chinese parts (unless you buy your new parts from an OEM dealership at much higher prices you cannot be sure).
Lots of fake/substandard brake parts for sale on eBay as well. That's even worse due to the safety aspect of the part. Too bad people still buy these junk parts, risking their own lives in the process.
2014 Versa Note SV