Huffy Boys OR Girls 20″ Bike ONLY $39 This post may contain affiliate links. Please see the full disclosure policy here. Posted on November 25, 2012 Written by Mary Leave a Comment WOW! Huffy 20″ Bikes are ONLY $39 from Walmart today. Choose a girls or boys Huffy 20″ Bike. What a GREAT PRICE! Choose in-store pickup to avoid any shipping charges.