we need a bidding website. not available free script are what we are looking for. The website have to be specialized for proposals. No automatic winning system based on the lower price. Is very simple. used for educational purposes here because it is not based on a concept of efficient business. however, should have the integrated payment systems for the publication of the offer. No calculations on commissions on the final value of the sale. Must have a system of users signups, publications of offers and acceptance thereof.