I changed four tires at my friend's shop.

My friend said the cost price was 500 yuan each, and just give me 2000 yuan as the cost.
I handed over 2200 to my friend, saying I couldn't let you work for nothing.
Later, I went to the car wash across the neighborhood and casually asked about the price of the same model of tires.
The owner said 300 yuan each. If I change four, just give me 1000 yuan.
I paused and confirmed with the owner again, saying: "You mean these same model tires are 300 yuan each???"
The owner, still wiping the hood without looking up, said: "Yes, just got in last week. The tread pattern and model are the same. Four for 1000 yuan, definitely a good deal."
I didn’t say anything else, sat back in the driver’s seat, feeling a bit stiff in my neck.
The numbers 2200 and 1000 kept spinning in his mind.
It wasn’t about being upset over spending more money; it reminded him of my friend patting his shoulder and saying: "Can I still make money off you with this relationship?"
It felt like a ball of cotton was stuffed inside his heart.
Later, he still went to his friend's shop to chat casually, but never mentioned repairing or replacing parts again.
Until half a year later, when my car was rear-ended, my friend proactively brought someone from the repair shop to assess the damage, running around helping him replace original factory parts,
and paid a 2000 yuan deposit, saying: "You go ahead and do your work. When it’s fixed, I’ll settle with you."
When I went to pick up the car, the repair shop owner said: "Your friend is really decent. The bumper could have been fixed under insurance, but he insisted on replacing it with a new one, even bargaining with me for a long time."
I transferred the repair fee to my friend, and he returned 500 yuan.
He mentioned the tire incident last time, and later my wife said: "I remembered the cost price wrong, I charged you too much. This 500 yuan is to make up for it."
I didn’t push back anymore, took the money, and handed over a box of wine, sending a message: "Why does a friend need to be so precise?"
Now I occasionally chat with the owner of the car wash about tires, never mentioning prices again,
but instead saying that some accounts seem to be a loss, yet you can see who truly considers you a friend.