A friend gave me an old bonsai stump, and the moment it arrived home, someone bought it for a flat 800 yuan

A pot of old bonsai stump that a friend gave me, and as soon as I got it home, someone wanted to buy it, and it was taken for a flat 800 yuan!
My friend is someone who really loves growing bonsai, and he always says that growing bonsai has brought him great benefits, and that growing bonsai is also good for physical and mental health. A while ago he even gave me a pot of bonsai, but I don't really know much about growing bonsai, and I don't know what variety it is either. Let's take a look together.
This kind of bonsai stump looks quite imposing. My friend says that besides looking at the tree species, if you want to know its value, you can estimate it based on its pot age and the shape of the stump. Never mind how much this bonsai is worth for now; just my friend's kindness is really touching. I heard from my friend that the tree species of this bonsai is called Chinese holly (Ilex cornuta). I wonder if you have ever grown one?
As soon as this pot of bonsai got home, it caught the eye of the older neighbor who grows bonsai, and he insisted on buying it. But the older neighbor is also a super bonsai enthusiast. At his repeated requests, I asked my friend whether I could sell it to the older neighbor, and my friend finally agreed, and the deal was settled at a price of 800 yuan.
But in the end, the money from selling the bonsai still went to my friend. I can't accept a reward without merit; I'll just take it that this bonsai and I were not meant to be, haha. Another day I'll go to my friend's place and pick another pot.