Balls are my favourite to weigh because you don't need to put them in a bag
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<a href="http://www.myweigh.com/mediumscales_3001.html">Click here</a> to see what scale I use to weigh my balls
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It's a great, accurate scale with alot of features and the best part is it is under $100 CDN! It has a tare feature which is perfect because you need to put your snake in some sort of container (I have a large plastic salad bowl on mine.
<img src="http://www.ssnakess.com/photopost/data/507/22marvin_1266.jpg">