i always do that, just because it gives u more time to mull it over without the salesman in your face, and to talk things through with someone u trust rather than a salesman who, at the end of the day, is trying to make money from you so will tell you exactly what you want to hear, and maybe not the most practical thing!! i would of thought any salesman would be used to this, and if u did a good job then im sure they will be coming back to you!! i wouldnt worry about it!