I bought a used Camry from a dealer's lot (8 year old car with around 90K miles). They had taken it in trade-in on a new car a full year earlier. They priced it to sell and it ran pretty well. I noticed it had a sticker on the engine indicating the timing belt had been replaced, which turned out to be when the car was received in trade. Apparently the original (female) owner neglected the recommended service and broke the belt and her solution was to just trade it in. After purchase, I did a coolant change and discovered chunks of rust in the system - so apparently that system was ignored. Changed the plugs, and yes they were original. The loud ticking from the engine was likely due to rare oil changes. I kept the car for 5 years as a beater and put about 35K on it - only failures were the automatic antenna and an ignition cable.
Buying used makes the most sense economically, but it can be a gamble.
Buying used makes the most sense economically, but it can be a gamble.