Somewhere in the heart of Missouri exists a candy wonderland that transforms grown adults into wide-eyed kids faster than you can say “sugar rush.” Nestled along Interstate 44 in the small town of St.

Designer labels play hide-and-seek among the racks—a Calvin Klein blazer with tags still attached for $12.99, a barely-worn Liz Claiborne dress for $8.99, and once in a blue moon, the holy grail: ...