6- Why are some carburetors more expensive than others?

Several reasons; some carburetors we have an over-stock of, so we frequently mark these down to clear them from our inventory. Others, especially the late model computerized carburetors, often use parts that are extremely expensive, even at the wholesale level we purchase them at. Some mixture control solenoids, for example, may cost hundreds of dollars each. And that's just one component.