1. Low cost and flavor. Goose egg oysters are farmed in a large area and centralized, resulting in a lower cost of purchase. In addition, Fujian oysters are on the small side, and the farming cycle is half a year - 1 year, which gives them an advantage in competition.

2. Goose egg oyster is a specialty food of Fujian, due to its unique flavor, it may be unacceptable to people in some regions, which may be one of the reasons for its lower price in some areas.

In summary, the reasons for the cheap price of goose egg oysters are many, mainly due to its low cost and unique flavor.