Never buy anything from a human that is trying to sell you on anything. Humans are far too dangerous for that. Know what you want first then get the best price you can.
DON’T watch TV, DON’T turn on the internet, DON’T read anything with ads, and have someone sort all of you mail for junk before looking at it.
This is ridiculous,
"If we asked people what they want they would have said faster horses"
Henry Ford
As for sales people, I don’t own any Apple products but could listen to Steve Jobs pitch them to me and be captivated.
Steve introducing the iPhone in 2007: