Following the emergence of the Internet, electronic negotiation has become an alternative to face-to-face negotiation. The rise of websites such as electronic marketplaces or electronic brokerages also fueled the popularity of electronic negotiation. The current forms of negotiation support systems (NSS) used to support many electronic negotiations offer very little support for historical negotiation data. In order to address this issue, the idea of a collective memory support in negotiations has been proposed in recent years. This paper highlights the use of an online intermediary as an effective location from which collective memory support can be offered. The paper proposes that an intermediary based collective memory support will increase confidence in negotiation, reduce overall negotiation time, and strengthen trust between negotiators.