The virtual item auctioning system (VIAS) has economic potential as millions of online players trade their virtual items in an auction-based environment. However, little empirical research has been conducted about understanding the factors affecting the decision to use the VIAS in online games. To address this gap, the current study uses the technology acceptance model (TAM) to explore the effects of extrinsic motivation-perceived usefulness, intrinsic motivation-flow, and trust on the decision to use the VIAS in online games. Three hundred and twenty-eight surveys were gathered from the users of VIAS in online games. The research model was tested with the structural equation modeling technique, using AMOS 20. The results showed that intrinsic motivation is more important than extrinsic motivation in explaining the use of the VIAS. Furthermore, trust is a strong predictor of both intrinsic and extrinsic motivation. We conclude the study with the discussion of the findings, managerial implications, and suggestions for future research. (C) 2016 Wiley Periodicals, Inc.