TJ Maxx's sales are booming, at a time when retails chains seem to be rapidly approaching extinction.<br />According to Business Insider, one reason for TJ Maxx's success is simple: they're cheap!<br />It keeps its prices for designer goods so incredibly low by how they buy their merchandise.<br />It buys stock from manufacturers that make too much, and department stores that overbuy.<br />Then, it jumps on deals at the end of the season.<br />Plus., TJ Maxx also has merchandise manufactured exclusively for its stores. <br />