Quote Originally Posted by albada View Post
My complaint about the $70 unit is that it's influenced by nearby static electric fields on my fingers. It's accurate as long as my hands are over 6 inches away.
Any scale that's getting into the milligram resolution or better range is going to have some susceptability to static, as well as air currents. You can make a little enclosure out of cardboard to help deflect air currents.

I've had good luck with the cheapo ebay digital scales. The two I bought 5 years ago read a set of certified weights nearly dead on. Not bad for $25 scales. The only problem is the one that reads to 1000g is smaller than the one that reads to 100g so you need to have a light-weight weighing boat to measure large amounts on it.