The creator of PROe.biz system technology is NAR marketing. The specialist for the implementation of marketing processes. It is the owner of the software and the autor of the system. The e-biz project of online negotiations begun in the middle of 2001. At the beginning of next year, we founded subsidiary company “Sentinet“ where the software was tested for period of one year in hundreds of real e-auctions. The software was developed and improved continuously. In 2003 the company evaluated their experience and created B2B purchase-selling online system PROe.biz.