If you buy slightly nicer luxury-ish vehicles (M-series BMW, E/S class Mercedes, Audi, Porsche) the extended warranties are unbeatable. It's nice getting a Porsche Cayman rebuilt for $150 deductible because you purchased a $4500 100,000 mile warranty. Jalopnik had a write-up on a guy who bought the much maligned Range Rover and basically recouped his purchase cost in 1 or 2 warranty-covered repairs.