Having spent almost all my working life as a salesman, almost exclusively new and used cars........still with me? thanks most people have run away by now :lol:.
Sales is a skill and I have spent many hours been told (taught?) how to sell things, many sales techniques some good some verging on illegal a lot certainly immoral.
I suspect, as you are a member of this forum, you do not want to be a salesperson you want to be a tiler so one or two pointers that may help.
PEOPLE BUY PEOPLE. sell your self first. be punctual polite introduce yourself using your first name, only use their first name if they respond with it if the response is a surname they expect you to use it.(Always gets my back up till I count their money!)
SELL THE SIZZLE NOT THE SAUSAGE. Your client does not want to know about the technicalities of the adhesive you use they want to "see the room". Sell the image to the decision maker....this is not always the person paying the bill. IE,and ladies i do not wish to appear sexist in any way just try to give an example, a housewife will almost certainly make the decision on a kitchen but the funding decision ( savings ,loan, etc) could be a joint decision or soley the remit of the husband. However a toilet may be a different story!
IF AN OBJECTION IS MADE IT NEEDS TO BE OVERCOME. Ignore at your peril the client has noticed, it will be all they remember when you have gone. You will gain greater respect be telling them something you think they dont want to hear than ignoring it.
it is likely they know you are right but will try to convince themselves otherwise.
FOLLOW UP PROMPTLY. A courtesy phone call 24 - 48 hours later may just make the difference BUT dont become a nuisance.
DONT BE AFRAID TO ASK FOR THE BUSINESS. NUFF SAID
Sorry if ive gone on a bit but if it helps one of you get one extra job it was worth it.