> 0.1g is rare, and these usually cost more, especially if they're actually reliable.

You can buy a coffee scale for $10-$20 that has 0.1g to 2000g or 3000g accuracy. I run a cafe and have tested these using our much more expensive scales, they are accurate. Not suitable for high volume commercial use but probably good enough at home if you're on a budget.

You should also check on the back of the scales how the accuracy changes across it's range, they'll often be accurate to 0.1g up to 1000g, and then accurate to 1g for the rest of the range. This includes expensive scales.