Faced with the high selling price, some consumers with limited budgets have begun to be active on second-hand trading platforms, looking for full size sex dolls with high cost performance. This behavior has led to the gradual formalization of an originally niche gray trading market. In the American sex doll trading circle, the second-hand market is forming a relatively mature set of evaluation standards, such as cleaning process, completeness of accessories, frequency of use, etc. Although second-hand products are still controversial in terms of emotion and hygiene, the price advantage and convenience of instant access make it the first choice for many beginners. The tax increase policy was not intended to affect this sector, but it has invisibly promoted the development of another parallel ecosystem.