Thumb Score: +22
Amazon has 100-Count Hillman Fastener Galvanized 1/4″ USS Alloy Steel Flat Washers (811070) on sale for $0.18. Shipping is free with Prime or if you spend $25 or more.
Thanks to community member StrongMoney163 for finding this deal
Note, the part number (per Amazon) matches other sites selling this product as a 100-count product. Product usually ships within 1 to 2 months