IF you package them in look alike packaging and try to sell them as genuine, they are fakes. If, as Ben says, you admit they are refurbished, meaning genuine products that have been repaired and are offred for sale in no box, or obviously not the original retail packaging, you are totally within your rights.
I can't begin to tell you all of the Canon printers I've bought and sold in plain brown boxes.
In the 1990's. Please to not contact me wanting a deal on printers!
.