Between those two, I’d go for the Camry if you want to get the most mileage out of it.  As for mileage, get the lowest mileage you can afford.  Nothing wrong with higher mileage ones, but just make sure it has a decent service history and always have a trusted mechanic check it out before you buy.

They’re both pretty good cars. If you want a very reliable car better performance, go for the Accord. If you want something that’s completely indestructible, but kind of bland, go for the Camry. I would just make sure to get one with less than 100k miles. Since those cars are around 6 years old, a good majority of them will likely have 60,000 to 100,000 miles by now. But see if you can find some in retirement communities or something and buy one off some old person who can’t drive anymore. I got lucky buying my grandpa’s 5 year old Civic a couple years ago with only 10,000 miles 

the lowest mileage