I tried to get such a kitchen scale and couldn't find one that wasn't either highly imprecise or ridiculously expensive (like three digit euros)

If you have a vintage one that is reasonably exact, they're great.

You cooking meth there or something? It's a kitchen scale, I doubt you'd need that much of precision from it.

I use the kitchen scales (and a smaller set of digital scales) for measuring out things like resin where you do need a reasonable degree of precision, especially when you're measuring out small amounts e.g. 5g of A and 6g of B.

yep, also been doing that, mixing epoxy requires good accuracy.

that being said, UK police considers kitchen scales as evidence that you were dealing drugs

Ever tried baking with some of your ingredients 20-30% off? Doesn't work well for lots of recipes. What's even worse is when the error isn't a linear x%, but changes with increasing weight.