Shared shuttle or private car from Denver to Vail?

Shared shuttles run roughly $75 to $140 per person depending on operator and season, on a fixed schedule, with stops for other passengers. A private transfer is priced per vehicle rather than per head, leaves when you land rather than on the hour, goes straight to your door, and holds if your flight is late. For one person travelling light, a shuttle is cheaper. From about three or four people the per-person figures converge, and the experience does not.