I bought this one on Amazon for $20: https://www.amazon.com/gp/product/B07NZ4TSBP/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1

It reads to 0.001g so it's fine for weighing doses down to 0.01g. I checked calibration with a series of NIST class 1 calibration weights and is accurate to +/- 0.003 or better.