I have the Salter kitchen scales, I think they were about $100, I love them, the convert from lbs/oz and kgs/gms plus fuid as well and the can be zeroed out so that you can put a normal plate on the scales and then add food, zero it again and then add more food
Do you mean digital or analogue? I have a set of Salter ones too... love them... not digital (I'm too old fashioned for them)... piccy HERE. I've found them to be very accurate.