I use an OXO Food Scale, has worked well for me. It measures in 1/8 oz increments, which I felt left a little too much of a variable in spice additions, but converting over to metric has resolved that concern, as the scale does go down to 1 gm increments.
Pricewise, I think it runs around $40 at Walmart or Target. It is easy to clean, you can zero out your container or baggy, and the display pulls off of the base for larger containers. It only measures up to five pounds, but for 5G batches I think it is a great choice.