One hundred yuan for 10 frozen crabs is a very cheap price. The price depends on a number of factors, including the type, size and origin of the crab. Usually, fresh seafood is relatively expensive, while frozen crabs are relatively cheap. However, whether it is expensive depends on local market conditions and the quality of the crabs. If the quality of the crabs is good and the price is low compared to the market price, then it can be said to be an affordable price. Before purchasing any product, it is recommended that you understand the market conditions and the standard price range of the product so that you can make an informed purchasing decision.