Water spinach, a common and affordable vegetable in Vietnam, becomes a luxury item with high prices in foreign countries. In Canada, a bunch costs around 105,000 VND, and in Korea, it's 52,000 VND for a bag. In Japan, a bunch costs 50,000 VND but only contains six stalks. In Russia, it's 15,000 VND for a bunch with a small fist-sized bunch. In the UK, it ranges from 71,000 VND to 127,000 VND depending on the source. This vegetable is less common in supermarkets and often found in ethnic markets.