One form of the development of technology and internet users in Indonesia is the merge of various C2C
(Customers to Customers) e-commerce on the marketplace. Bukalapak is one of the examples. This research presents the effects of
reputation systems on trust, trust in buying interest, and reputation systems on Bukalapak customers’ buying interests. A total
of 120 respondents participated and the data were analyzed using structural equation modeling with Amos 20 software. The results
show that the reputation system has a higher direct impact compared to the impacts mediated by trust. Therefore, in an effort
to increase the buying interest, the sellers should increase their reputation in the reputation system represented in the list
of feedback, review, and the badge level in Bukalapak. To marketplace providers, in this case, Bukalapak, there is still a need
to increase the customers’ trust. Although it is significant, however, it has low impacts both directly and indirectly.