Reusable first stage (which is the largest, most expensive part), expendable second stage (only one engine vs nine on the first stage), and reusable spacecraft.

Reusable first stage (which is the largest, most expensive part), expendable second stage (only one engine vs nine on the first stage), and reusable spacecraft. I'd be surprised if the Falcon second stage cost more than the Shuttle's external tank. (Though, to be fair, they are decades apart)