What should I be looking for when buying a used Mustang? I am currently in the market for a used 2015-2018ish Ford Mustang V6 or eco boost. I have quite a bit of experience with the 05-10 generation from when I owned one but I don’t have much first hand experience with the newer gen. What issues should I be looking for and what should I be paying attention to while examining a vehicle? I am in South Florida if that helps. 

Also, side question: Can somebody please explain to me why the hell there is such a mustang shortage right now? 

I have done quite a lot of research but would like to hear from others. Thanks in advance!