marketing value; value for money; cost benefit

How can you prove value for money or value over cost? I’m self-employed and offer a marketing consultancy service that is time intensive which is reflected in the cost.  The bespoke service achieves great results and I therefore consider I offer great value, particularly in comparison to competitors.  I wouldn’t view my service as a ‘premium price’ however, there seem to be an increasing number of businesses who are signing on …