I bought an Acculab V-200 scale on eBay for $99. It shows 0.01 gram and the accuracy is +/- 0.01 g. It's great when I weigh up 0.5 g of, for example, Potassium bromide. But one can also make a 10% solution of bromide and use 5 ml to get the 0.5 g.(posted 8422 days ago)So, a scale with an accuracy at 0.1 g is okay.
Check eBay for the Acculab V-200, this model is recently discontinued so you can get a new one cheap! The extra accuracy is great!