vehicles in zihua, best to purchase in Zihua or bring fom?

I have done both. There IMO is not one way better than the other. Like any vehicle used you need to have it checked out by a mechanic you know and trust. With a new one you need to do all the proper service requirements. I had a fairly new at the time (forgot the year) Dodge Neon that I bought off the side of the road from the original owner for about 8 years. Now I have a 2008 Chevrolet Captiva that I bought from the dealership. I have had problems with them both. I prefer the Captiva but not because it is a better vehicle but because the type suits what I do better.

You pay your money...you take your chances. Good luck.