Repro carts are becoming indistinguishable from originals, which is terrifying for the hobby. Cross-referencing the board like you did is basically mandatory now. Did the listing have any other suspicious details, like price or seller location?
What about the pressure this puts on new collectors who lack the technical knowledge to inspect boards? They're relying on community wisdom, which can be inconsistent and sometimes gatekeepy. We might be creating a barrier to entry that harms the hobby's growth in the long run.