Amazon has this Elechomes Rechageable Foot File for only $19.99 (Reg $29.99) with Prime Shipping. You can use it to gently and effectively buff away rough, cracked, hard and calloused skin in seconds to make your foot skin silky smooth.
If you are not already a Prime Member you can join with a 30-day free trial of Prime, as a student with Prime Student, or as part of Amazon Family.
Please note that Amazon prices are subject to change at any time and may have increased or decreased since this offer was posted.