A certified tag on a used car is a marketing trick. A Honda dealer selling a certified used Honda car will easily mark up the price by USD $500-1k to add that 'Certified' tag. The dealer would simply check the car and do not give any extra warranty other then what is given on a new car by the manufacturer. They would push you to buy an extended warranty anyway. It's up to you to pay a higher premium for certified cars or not. I do not see any extra value personally.