(93)Where national provisions determine the remuneration of certain services or set out fixed prices for certain supplies, it should be clarified that it remains possible to assess value for money on the basis of other factors than solely the price or remuneration. Depending on the service or product concerned, such factors could, for instance, include conditions of delivery and payment, aspects of after-sale service (e.g. the extent of advisory and replacement services) or environmental or social aspects (e.g. whether books were stamped on recycled paper or paper from sustainable timber, the cost imputed to environmental externalities or whether the social integration of disadvantaged persons or members of vulnerable groups amongst the persons assigned to performing the contract has been furthered). Given the numerous possibilities of evaluating value for money on the basis of substantive criteria, recourse to drawing of lots as the sole means of awarding the contract should be avoided.