My favorite scale is the one that looks like a CD case. Its just a cheap one my homie gave me, but no one ever notices it and my place has been robbed (got a few plants taken too) and they didn't notice it.
Just don't get caught with a scale & weed man. Specially if you get a small one, don't leave it in your car. If you get busted you'll get some time man. be careful.
Here ya go all kinds of scales here.Hope ya find what your looking for. http://www.oldwillknottscales.com/ I picked up the 222 proscale Weighs up to 222 grams,a small digital pocket scale and I'm real satisfied with it.