Category Events - United States, Waterloo (IA) Say hello to a good buy by shopping area garage sales in the Cedar Valley area! Planning on hosting a sale? Add it online at no cost. Planning on shopping sales? Search the sales and plan your route. Visit https://www.dupaco.com/GarageSale for more information and to get started! This community-centric event is made possible by Dupaco Community Credit Union, Townsquare Media Waterloo, Q92.3, K-98.5 Official Page (Waterloo, IA), AM 950 KOEL, and KCRR Classic Rock.