There’s been instances of local bike shops stocking fake chains. Supposedly unknowingly, bought from the ‘man with a van full of parts’ type supplier rather than from Madison etc but it has happened.Just buy at your LBS or a decent online retailer (ideally LBS) to avoid the (high) chance of a fake. My local guy mainly stocks Taya, and they have given me good service, certainly not significantly different to KMC or SRAM.