That's great to hear chic.
Keep up the good work.
I know just what you mean.
There has been more then one time that I was sent out to install a new appliance and had been asked about what could be wrong with the old one by the home owner once I got to the house.
A few times I simply repaired the old appliance and returned to the shop with the new one in the truck.
This would tick the boss off, but the customers would be very happy and return to the shop time after time when they needed other repairs done.
You need to keep the customers happy and selling them stuff they don't need is not the way to do it.