Market prices vary depending on the region and the seller. Generally speaking, crayfish and oyster shrimp are relatively expensive, while sweet shrimp are relatively inexpensive.

In some areas, crayfish and oyster shrimp can cost several times more than sweet shrimp. For example, in some restaurants in Shenzhen, crayfish and oyster shrimp may cost as much as 435 yuan per kilogram, while sweet shrimp may cost only a few dozen yuan.

However, in other areas and selling merchants, sweet shrimp may cost more than crayfish and oyster shrimp because sweet shrimp may be available in smaller quantities or of better quality.

Overall, the price of crayfish oyster shrimp is relatively high, but the exact price depends on different regions and selling merchants.