You can’t say that in general. I have now looked at some in nurseries and tree farms. There are cypresses, pines, and many more that grow like that. Prices start at 50 euros, and upwards there is no limit. I bought a small one and still need one for the entrance.
I would not see these Big Bonsais as trees, but as sculptures and only as individual pieces. Then this artificial thing becomes an object of desire again, worthy of its price :)