You may be thinking all customers are worth keeping but I bet to differ. There are customers that only cost you money and time. For example, you have something you’ve never worked on before and then parts aren’t available or it’s had 2 or more people already do some shot work on it, or they want to fix something and tell you to order the part and then call you back to say they purchased a new machine and no longer need your services. This is tge worst one because you’ve ordered parts you must return that may have a return charge and they stiff you on the service call. These are a few reasons why we collect down payments now. So there is a commitment required. Now the latest thing is the how much do you charge to come out and this will only bite the customer back when they pay very little for an unqualified tech that either promises a free evaluation upon a repair or charges an astronomical amount without an estimate to do so. So what I say is not knowing is guessing and guessing cost a lot of money in the repair business and usually not the repairer. These are a few things to look out for.
If the repair company gives an all day appt.
If there is a written or emailed estimate that requires a signature.
Whether or not they give their name and/or company name when answering phone.
Are you calling a routing system or the actual service provider directly?
If multiple parts need to be ordered 3+ then explanation is available and make common sense to you.
Did they list part numbers and how much are those parts if you were to look?
What kind of warranty do they have on:their parts, labor, and service call ?
Research the company and check reviews to have peace of mind before hiring.