Ho Chi Minh City is currently selling lobsters and sea crabs at unusually low prices, raising concerns about their quality and safety. The regular market price for live lobsters ranges from 1 to 1.5 million VND per kilogram, while dead lobsters cost between 500,000 to 600,000 VND per kilogram. Cheap seafood can potentially be dead, diseased, or previously frozen, posing various health risks. Experts recommend buying seafood with a hard shell and ensuring it is still fresh to avoid these risks. They also suggest looking for signs of freshness, such as a crab's struggle, to ensure the seafood is alive and safe to consume.