Some dealers do you make despair.
My daughter was buying her first car last August; we made a 90 mile trip to Glasgow to view two used cars by appointment. The first, a Ford Ka had been sold when we got there. They offered us a drive in another, which we accepted. We then waited 40 minutes while they a) inflated the flat tyre, b) jump started it, c) moved about 20 cars to get it out, and d) went off to the petrol station to fuel it. They knew we were coming and were buying but had not thought to prep the vehicle.
Contrast with the second garage (Arnold Clark) which had the Kia Picanto washed and warmed up sitting outside the showroom, looking immaculate. We bought it.
Getting the basics right is not difficult.