I didn't buy my digital food scale, it was a Christmas gift, so I don't know how much it cost. It is VERY accurate though and I love it. It is a Salter brand. I had a cheap-o wal-mart scale for a long time, and it helped me lose over 100 pounds, so it worked! I just had to constantly set it to -0- and weight things a couple of times to get an accurate reading. The weight fluctuated depending on how lightly I placed it on the scale...
I always weigh my meat, cheese, and potatoes, (sweet and white). Oh and nuts and peanut butter. Sometimes fruit, if its something I don't eat often...just to get a sence of what a serving actually is.