>>26438
What's up with that "clarkson-russia"? It's not the first time you posted it.
You don't need to argue. Just ask simple questions, hum a little, check the car out, in and out, ask to start it (or if you can start it), etc. Don't comment stuff positively or negatively (especially not negatively). Be polite but not submissive, keep it simple, quiet. Maybe you should check other cars first you don't wanna buy just to get used to the process, to test yourself and refine your technique. You don't have anything to lose, you'll never gonna see them again anyway. Do the deed, then evaluate what you did wrong, and do it differently next time.
Ofc every people will be different and that's a variable which have an impact on the interaction.
Maybe you should do it anyway even if you buy from a dealership, it might give you an experience for the future which can come in handy.
The things we are bad at or inexperienced or uncomfortable with are the things that needs practice and not what's easy and well.