All fake knock-off replicas or "Custom jerseys" have stripes made of cloth. Obviously there are other tall tell signs too, but the EASIEST way to tell an authentic Packers Nike Elite jersey versus a fake jersey is by looking at the stripes on the sleeves!!!!
Why do you think some sellers hide photos of the sleeves or the front of the jersey or both or only provide low quality far away photos? Ask the other sellers to show yo u a close up of the jersey sleeve. Added a photo of the comparison.