I had a good one awhile back and for the life of me I can't remember the brand. I know some scales are off quite a bit and others are more accurate.
In case they have several different options, I only have smaller snakes, so I don't need to go into lbs or anything, grams only is fine and I say this because some dual weight systems are more expensive then something that only weighs in grams.
EDIT:
I was looking at a Digital Food Scale 5Kg I think it's called and can weigh up to 5000 grams, but I don't know how accurate it is.