<human>: Can you provide a brief rundown of the text in within 3 sentences?

I'm sure other redditors have better ones but this really got me:

The other day I took my car into a local garage because the engine kept cutting out. I described the problem over the phone and the mechanic seemed to know what it was straight away. Within a few hours my car was working perfectly and they'd given it a full service for me(not a lot needed doing as it had just been MOTed but it was nice all the same).

I went to pick up my car and pay for the work. I turned up at the garage and went to pay for the work. £70 including parts, which I didn't think was too bad. I got dragged into the usual small-talk with the guy behind the desk and it turned out he'd been the one who'd fixed my car.
"Is it a common problem this then?"
"Oh, yeah. If I had a fiver for every time I saw it I'd be a rich man."
I'd just paid this guy for 'seeing it' and he's there asking for another fiver. Next time I'd rather he stick it on the bill than use that phrase.

I don't mind the saying under normal circumstances but when professionals who I've already handed money over to use it it really gets me. Another example is shopkeepers "If I have a pound for every time someone came in looking for that"(whilst selling you it).
<bot>: people who you've paid saying if I had a x-amount of money for every time <insert service you've just paid for>.