Used car advice please

Afternoon all,

I'm currently in the process of buying a used car. To those that have is there anything you wish you'd taken into account or something that the average person may miss?
I'm currently using car sensor, budget up to 1.5M, no keis, less than 80k on the clock, no accidents, same ken, and non smoking car and mainly looking at dealer cars to get the 1yr warranty.
Local cars are likely a better idea but I find the designs seriously dull so have been to view Volvo, VW, Peugeot etc.
Would appreciate any advice!

by TheCosmicGypsies