Walmart offers this Mechanical Personal Bathroom Scale in White, model no. BR2016, for $3.48. Opt for in-store pickup to dodge the $5.99 shipping charge. That's tied with our mention from a week ago as the lowest price we've seen for any mechanical scale. (It's also $13 below the best price we could find a similar scale elsewhere.) It features a PVC foot mat and 300-lb. weight capacity.

Of note, it's also available in Black for a few cents more.