That is still a bargain for the services that the tree provides.
The best "premium shadow package" available on the market. Comprises: filtered light, relaxing breeze sounds, noise blocker, chirping birds and flowers, dumb squirrels frolicking around and fresh soil, all in the same package for just ten dollars a sapling.
$10 for a sapling is extremely cheap. That's more in the line of what you can expect to pay for a 2 year old seedling (ref: https://monroecd.org/tree-sale-2024/). But I agree. I've planted 10k+ seedlings (most not personally; I hired a crew). It's actually fun to watch them grow. Douglas Firs take about 5 years to grow to 5' (from 18"). After that, they grow 3'+ a year. Not being a food source, they don't attract wildlife though nor do they have flowers.
