"Yellow-rank top-grade Zengshou Pill, which increases lifespan by five years, is priced at 20,000 dragon-slaying coins."
This kind of life-enhancing pills ranges from low-grade yellow grades to top-grade sky-grade pills, but the selling price of the best-grade longevity pills has reached an extremely terrifying level, and the string of zeros behind it is even too lazy to count the odd numbers.
Because he can't afford it.