You have to know what you're getting from AliExpress, not everything is YGWYP when compared to the major electronic supply houses. I buy pre-fab cable assemblies with the 1.25mm and 1.5mm connectors and wires from AliExpress for a small fraction of what they'd cost at Digikey, I've been very happy with their quality. I also buy stuff like the 1527 learning code transmitters & receivers there, they would be totally cost prohibitive from any US manufacturer.
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