I bought a used Honda Pilot from a dealer last spring and did purchase the extended warranty it was $1500 bumper to bumper for four more years. That works out to $375 per year, $31.25 per month or $1.03 per day!!!!!! Less than a cup of coffee. When you are buying a used car you really don't know how the last owner took care of it. A buck a day is pretty cheap insurance. I have a couple of minor issues that need to be taken care of 1/ faulty air bag sensor 2/ faulty srivers side window switch. The repairs for these two little items would likely be between $500 and $1000!!! If something more serious were to break like a transmission, transfercase or differential we're talking thousands. I have heard of people paying up to $5000 for a tranny!!!!
If you are buying through a dealership I would buy the warranty through them.