FamilyMart, a popular convenience store chain in Japan, has made headlines for the sudden sell-out of their moderately-priced $20 wristwatches across the country. These watches, priced at 1998 Yen each, have gained incredible popularity, leading to their instant sell-out despite them not being a high-end luxury item. The news story explores the factors behind this unexpected sales surge.

In Japan, consumer behavior is heavily influenced by multiple factors including the quality-price ratio, cultural elements, brand reputation, and latest trends. Quick everyday items becoming an overnight sensation is not uncommon in Japan - a country known for its quirky trends, triggering much discussion and social debate. In this case, the value for money and the brand reputation of FamilyMart have possibly been at play.

In the US or EU, typically high-priced luxury items or popular tech gadgets tend to experience this level of demand and sell-out. It is not usual for affordable everyday items like a $20 watch to gain such overwhelming popularity. However, there are exceptions such as the huge demand for certain Fast-fashion collaborations or limited-edition collectibles.