You might think that providing a detailed reasons for your price would be more effective than just providing a price, but this is incorrect. A weak justification is far more effective. For instance, if you were to present price and terms and simply say, “this represents very good value for money” rather than “this represents very good value for money because x, z and z,” the first justification is far more likely to be accepted. This is because you do not providing them with enough information to generate any counter-arguments.