I am by no means pimping the Grizzly SB Hvy 10, but I think that cost is because it is a small Taiwanese commercial grade machine, not one aimed at hobbyists. If you look at the price of other commercial lathes $9000 is cheap. The Grizzly SB 1440 is $21,000 compared to $7200 for the regular Chinese Grizzly 1440. I have no idea what an actual USA lathe like a modern 14" Clausing costs because they hide behind "email for a quote", but I gather it is well over $50,000.
If you look at old catalogs and run the prices through an inflation calculator it is eye opening. A South Bend 9A 9x28" lathe was $514 in 1959, that works out to $4822 in 2021 dollars. The Toolroom version was $739 or $6932 today. Even the low frills 9C was $356 or about $3700 today. Sears sold the little 6" Atlas for $175 in 1960, $1641 in 2021 dollars.
A real SB Heavy 10 would be about $14,000 today based on the 1959 prices. The better Taiwanese lathes are cheap compared to what the vintage USA stuff would cost to buy new, and the Chinese stuff is a bargain.