Recommendations for a cheap scale?

I only have about 20-25$ to spend. What is a reliable scale. I just bought one on a whim, and weighed different 5 times in a row, so I'm taking it back.
It's been three weeks since I weighed at the doctors and 11 days logging and counting calories (1200 cal but over every Friday and Saturday).
I need to figure out if I'm dropping or not.

Thanks for prompt replies. I'm ready to go out and buy one right now.

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