To be fair, QC pass stickers are going to be sold like that just because you'll need a lot of them if your only way of identifying pass/fail is via a sticker. I

To be fair, QC pass stickers are going to be sold like that just because you'll need a lot of them if your only way of identifying pass/fail is via a sticker. I don't see why you wouldn't buy those en masse, and use them on a real assembly line -- especially in a country where most plastic goods are produced.