Costco has a handful of top-performing bottles for under $20, which you'll almost always find on the shelves. These wines include La Crema pinot noir, Coppola claret, and Kim Crawford sauvignon blanc, said Annette Alvarez-Peters in an interview with Market Watch magazine. But Costco's wine aisle is constantly changing. Costo's buyers tailor what's sold at different stores based on local preferences — and you can often find rare, surprising, or collector's items. Alvarez-Peters calls these the "wow" items, which make shoppers want to return. So browse through the wine aisles carefully: It isn't rare to find a boutique label or a highly sought-after wine at an awesome value.