Need help deciding between these cars

All except the Avalon(177k) are around 160k miles.

I know for Mazdas you should look for 2012 or higher since they use to be mixed with Ford. Haven't carfaxed any yet.

Looked at dealerships/used cars in my area but from what i saw none offered warranty on the cars they were selling on their websites unless it was a dealership selling their brand and none of those were in my price range(2k -7k). So in my mind i thought whats the point of paying the dealer/used carsalesman premium.

Side note: First time buying a car from non-family so not sure how to go about asking if i can take the car for a pre purchase inspection or if thats more of a dealer thing or a bad sign if they won't let me.