MINNEAPOLIS--(BUSINESS WIRE)--Driven by parents and millennials seeking a good bargain, Winmark Corporation®, the national leader in retail resale franchises, is continuing to experience solid growth. Parent company to five, diverse niche concepts— Music Go Round®, Once Upon A Child®, Plato’s Closet®, Play It Again Sports® and Style Encore®—the company is thriving from the rising trend of consumers seeking high-quality, gently used merchandise. With more than 430 units currently operating, the