Cloud computing is a service model enabling resources limited mobile devices to remotely execute tasks on the clouds. The Mobile Agent is a software program on behalf of the software installed in the mobile device to negotiate with other mobile agents in the clouds, which provides a diversity of automated negotiation based applications in Mobile Commences. However, the negotiation plans carried by mobile agents are easily be eavesdropped by the malicious cloud platforms, since the codes of mobile agents are read and executed on the cloud platform. Thus, the sellers can take cheat actions to increase their profits, which is to tailor the negotiation plans to seize buyers' profits after eavesdropping on buyers' negotiation plans. In this paper, we consider the buyers can take actions to resist the sellers' cheatings, that is the buyers can tailor their plans with extremely low demands before migrate to the cloud platform. Above situations are modeled as a mathematical model, called the Eavesdropping and Resistance of Negotiation (ERN) Game. We develop a simulator to simulate an artificial market for analyzing the behaviors on ERN Game. The simulation results show buyers' resistances deter sellers from cheating and cooperative strategies are adopted by buyers and sellers.