Never say never. I said no to the Toyota salesman, then out of curiosity asked for the parts cost of the master cylinder which controls much of the vehicle stability control system. $2500 at that time. So for $900 I bought a bumper to bumper 100,000 mile extended warranty on a new 2004 4-Runner. Standard warranty was 50,000 miles. At 60,000 the front differential was replaced for the $50 deductible. Then the transmission. Then a couple of wheel bearings and a broken plastic cowling. Then a brake cylinder and a shorted $3500 computer. Then an air conditioner repair on the other side of the continent. Then struts and shocks. Then I traded it at 101,000 on a new SUV from a different manufacturer, and needless to say bought the warranty. Not quite as dramatic for my wife's last two cars, but any modern vehicle with their very expensive electronics parts seems ripe for a multi-thousand dollar hit. You have to bargain for a decent price on those warranties among competing dealers. These expenses may not be life threatening but they can cut pretty deep. I'd rather be hit for the cost of unused insurance bought with the expensive tractor or car than be hit with the same cost for a repair that shouldn't have happened.