Exclusively for Prime members, Amazon offers the Ozeri Touch 440-lb. Digital Bath Scale in White, model no. ZB13-W2, for $28.88. Clip the 25% off coupon on the product page to drop the price to $21.66. With free shipping, that's the lowest total price we could find by $12 and the best price we've ever seen for this scale. It calculates body fat, hydration level, muscle mass, and bone index.

Of note, the scale presumably has a capacity of 440 lbs. and does not itself weigh that much. (If it does, you're getting a great deal on shipping here.)