A method of managing inventory allocations includes the step of receiving, in a data processing apparatus, data relating to the sale of items of inventory allocated to respective re-sellers. The date is processed to obtain data relating to sales performance of one or more of the respective re-sellers. The method includes adjusting a price for which inventory allocated to that respective re-seller is to be sold by depending on said data relating to the sales performance of the respective re-sellers and/or re-allocation inventory items from that said respective re-seller to other respective re-sellers. The invention extends to a software product and to a system.