What should I pay attention to when buying a used car from around 2017 that has been modified?

I'm looking to buy a 540c that's been in a major accident, preferably not from around 2017. Please include your asking price.

I'm considering buying a used Jetour X95. I'm not sure about the warranty and other things I should pay attention to.

What should I pay attention to if I'm considering buying a 2014 Toyota 86 with an automatic transmission?

What should I pay attention to when changing the tires on a Subaru XV? Are there any requirements for the tire tread pattern? Looking for advice.

I bought a used 2015 1.6T V40 with 50,000 km on it. What should I pay attention to, and what areas should I maintain myself? I hope fellow car enthusiasts can give some advice.

Looking to buy a used manual Touran from around 2012.

What should I pay attention to when installing electric running boards on the Elite version with air suspension? Do I need to select the jack mode?

What should I pay attention to when buying a used car from around 2017 that has been modified?

Looking to buy a Jeep Compass for personal use. Any model from 2017 to 2020 is fine.

What should I pay attention to for the second maintenance of the VS7? Any tips from experienced drivers? Do I need to use fully synthetic oil? Currently, it has run 9,200 kilometers.