How do you tell that you did not get any from a lot that was dyed/painted with a cheaper but toxic color?
I said 10$, but it depends on the length. So 60cm is maybe 10$, 70cm is 12$, 80cm is 13.50. So you would say that testing the 70cm variant of the zipper is worth 2$ more than testing the paint on the 60cm variant?
My point is that at this price, if I don't get the zipper on Temu, I don't get it at all. I won't pay 10$ for a zipper of this quality.
As you showed with slightly longer zippers.. I notice with car fob remote batteries. An 8 pack is $12 at the store. The same brand, a single will be $5. A 2pack is $7. And the 8pack $12. Do you really need to make $4 on selling me a single? I know shelf space is valuable, but the same store sells things for $1 too on another shelf so apparently <$1 profit shelf space is possible.