You can get a really good digital scale on eBay. I got mine last year for around $35 shipped, and it does up to 75 pounds. They are probably a bit cheaper now. Just search "digital scale" on eBay. There's plenty of ones you can bid on, or do Buy It Now as well. The one I got was an Ultraship 75 model, which I see is around $30 shipped now. The feedback for this seller is 99.9% and they have 14930 feedback.
As far as I know, it's been rather accurate, at least up to 30-35 pounds (the biggest things I've shipped using it). I haven't had anything returned to me or been charged more for inaccurate weight.
You can also weigh your Yorkies on it too, as an added bonus!
