Buy, sell or trade clothing and accessories at this Heights outlet of an innovative national chain.. In Short Buffalo Exchange is part of the 19th Street Marketplace shopping complex. The shop has 1,925 square feet of sales floor with polished, stained concrete flooring and open beam ceilings. Clothing and accessories are bought, sold and traded directly with store customers. Used clothes can be traded for any item in the store, including new clothing. The ever-changing inventory includes designer wear, basics, vintage, jeans, leather and one-of-a-kind items.