A system and method for making an initial product offering of tangible products and services. A price for a product may be determined by calculating an aggregate customer history factor by aggregating customer history factors of potential purchasers in a buying group, calculating a cumulative demand for a product as a function of (i) expected purchase quantities of the product indicated by the potential purchasers in the buying group and (ii) the aggregate customer history factor, and setting a price of the product as a function of the cumulative demand for the buying group. The tangible products and services may be offered at the determined price.