Buying a used car in greece - any tips / things to be aware of?

Hi! I will be visiting Greece this summer for my friend's wedding, and wanted to ask about the culture of buying/selling used cars in Greece. I have some money saved up and I'm mostly looking at youngtimers, fun cars from years around 1990-2000. Some of the models I'm interested in are known to have problems with rusting, and Greece is pretty warm and dry throughout the year so I was thinking that it's a nice opportunity to find something in a good shape.

I love Greece and Greek people, so that's another plus for buying the car there. Do you have any tips on that? Should I be careful of anything? Any tips? Thanks!